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Description: Exploring Python through counter-intuitive snippets. If you think you know Python, think once more! - GitHub - programmingtips/wtfpython at development

Open Graph Description: Exploring Python through counter-intuitive snippets. If you think you know Python, think once more! - GitHub - programmingtips/wtfpython at development

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	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-what-the-fck-python--
	http://www.wtfpl.net
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#table-of-contents
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Skipping lines?	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#skipping-lines
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Well, something is fishy...	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#well-something-is-fishy
💡 Explanation	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-1
Time for some hash brownies!	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#time-for-some-hash-brownies
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Evaluation time discrepancy	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#evaluation-time-discrepancy
💡 Explanation	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-3
Modifying a dictionary while iterating over it	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#modifying-a-dictionary-while-iterating-over-it
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation
Deleting a list item while iterating over it	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#deleting-a-list-item-while-iterating-over-it
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-1
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String interning	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#string-interning
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-2
Let's make a giant string!	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#lets-make-a-giant-string
💡 Explanation	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-5
Yes, it exists!	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#yes-it-exists
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-3
is is not what it is!	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#is-is-not-what-it-is
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-4
is not ... is not is (not ...)	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#is-not--is-not-is-not-
💡 Explanation	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-6
The function inside loop sticks to the same output	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#the-function-inside-loop-sticks-to-the-same-output
💡 Explanation	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-7
Loop variables leaking out of local scope!	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#loop-variables-leaking-out-of-local-scope
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-5
A tic-tac-toe where X wins in the first attempt!	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#a-tic-tac-toe-where-x-wins-in-the-first-attempt
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-6
Beware of default mutable arguments!	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#beware-of-default-mutable-arguments
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-7
Same operands, different story!	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#same-operands-different-story
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-8
Mutating the immutable!	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#mutating-the-immutable
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-9
Using a variable not defined in scope	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#using-a-variable-not-defined-in-scope
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-10
The disappearing variable from outer scope	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#the-disappearing-variable-from-outer-scope
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-11
Return return everywhere!	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#return-return-everywhere
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-12
When True is actually False	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#when-true-is-actually-false
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-13
Be careful with chained operations	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#be-careful-with-chained-operations
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-14
Name resolution ignoring class scope	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#name-resolution-ignoring-class-scope
💡 Explanation	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-8
From filled to None in one instruction...	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#from-filled-to-none-in-one-instruction
💡 Explanation	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-9
Explicit typecast of strings	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#explicit-typecast-of-strings
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-15
Class attributes and instance attributes	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#class-attributes-and-instance-attributes
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-16
Catching the Exceptions!	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#catching-the-exceptions
💡 Explanation	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-10
Midnight time doesn't exist?	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#midnight-time-doesnt-exist
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-17
What's wrong with booleans?	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#whats-wrong-with-booleans
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-18
Needle in a Haystack	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#needle-in-a-haystack
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-19
yielding None	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#yielding-none
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-20
The surprising comma	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#the-surprising-comma
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-21
For what?	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#for-what
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-22
not knot!	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#not-knot
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-23
Let's see if you can guess this?	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#lets-see-if-you-can-guess-this
💡 Explanation:	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-24
Minor Ones	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#minor-ones
TODO: Hell of an example!	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#todo-hell-of-an-example
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Some nice Links!	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#some-nice-links
🎓 License	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-license
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#structure-of-the-examples
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#some-fancy-title
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#usage
here	https://github.com/satwikkansal/wtfPython
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-examples
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#skipping-lines
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-1
code point	https://en.wikipedia.org/wiki/Code_point
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#well-something-is-fishy
mixed_tabs_and_spaces.py	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/blob/development/mixed_tabs_and_spaces.py
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-2
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#time-for-some-hash-brownies
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-3
answer	https://stackoverflow.com/a/32211042/4354153
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#evaluation-time-discrepancy
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-4
generator	https://wiki.python.org/moin/Generators
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#modifying-a-dictionary-while-iterating-over-it
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-5
thread	https://stackoverflow.com/questions/44763802/bug-in-python-dict
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#deleting-a-list-item-while-iterating-over-it
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-6
thread	https://stackoverflow.com/questions/45946228/what-happens-when-you-try-to-delete-a-list-element-while-iterating-over-it
thread	https://stackoverflow.com/questions/45877614/how-to-change-all-the-dictionary-keys-in-a-for-loop-with-d-items
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#backslashes-at-the-end-of-string
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-7
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#string-interning
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-8
here	https://stackoverflow.com/questions/24245324/about-the-changing-id-of-an-immutable-string
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#lets-make-a-giant-string
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-9
timeit	https://docs.python.org/3/library/timeit.html
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#yes-it-exists
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-10
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#is-is-not-what-it-is
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-11
https://docs.python.org/3/c-api/long.html	https://docs.python.org/3/c-api/long.html
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#is-not--is-not-is-not-
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-12
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#the-function-inside-loop-sticks-to-the-same-output
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-13
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#loop-variables-leaking-out-of-local-scope
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-14
What’s New In Python 3.0	https://docs.python.org/3/whatsnew/3.0.html
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#a-tic-tac-toe-where-x-wins-in-the-first-attempt
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-15
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/blob/development/images/tic-tac-toe/after_row_initialized.png
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/blob/development/images/tic-tac-toe/after_board_initialized.png
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#beware-of-default-mutable-arguments
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-16
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#same-operands-different-story
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-17
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#mutating-the-immutable
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-18
https://docs.python.org/2/reference/datamodel.html	https://docs.python.org/2/reference/datamodel.html
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#using-a-variable-not-defined-in-scope
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-19
this	http://sebastianraschka.com/Articles/2014_python_scope_and_namespaces.html
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#the-disappearing-variable-from-outer-scope
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-20
https://docs.python.org/3/reference/compound_stmts.html#except	https://docs.python.org/3/reference/compound_stmts.html#except
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#return-return-everywhere
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-21
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#when-true-is-actually-false
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-22
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#be-careful-with-chained-operations
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-23
https://docs.python.org/2/reference/expressions.html#not-in	https://docs.python.org/2/reference/expressions.html#not-in
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#name-resolution-ignoring-class-scope
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-24
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#from-filled-to-none-in-one-instruction
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-25
here	http://docs.python.org/2/faq/design.html#why-doesn-t-list-sort-return-the-sorted-list
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#explicit-typecast-of-strings
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-26
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#class-attributes-and-instance-attributes
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-27
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#catching-the-exceptions
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-28
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#midnight-time-doesnt-exist
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-29
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#whats-wrong-with-booleans
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-30
answer	https://stackoverflow.com/a/8169049/4354153
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#needle-in-a-haystack
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-31
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#yielding-none
this	https://github.com/satwikkansal/wtfpython/issues/32
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-32
https://stackoverflow.com/questions/32139885/yield-in-list-comprehensions-and-generator-expressions	https://stackoverflow.com/questions/32139885/yield-in-list-comprehensions-and-generator-expressions
http://bugs.python.org/issue10544	http://bugs.python.org/issue10544
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#the-surprising-comma
this	https://github.com/satwikkansal/wtfPython/issues/1
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-33
fixed in Python 3.6	https://bugs.python.org/issue9232
this	https://bugs.python.org/issue9232#msg248399
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#for-what
this	https://github.com/satwikkansal/wtfpython/issues/23
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-34
Python grammar	https://docs.python.org/3/reference/grammar.html
this	https://github.com/satwikkansal/wtfPython/issues/11
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#not-knot
this	https://github.com/satwikkansal/wtfPython/issues/1
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-35
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#lets-see-if-you-can-guess-this
this	https://github.com/satwikkansal/wtfPython/issues/9
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-explanation-36
Python language reference	https://docs.python.org/2/reference/simple_stmts.html#assignment-statements
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#minor-ones
sequences	https://docs.python.org/3/glossary.html#term-sequence
thread	https://stackoverflow.com/questions/3654830/why-are-there-no-and-operators-in-python
this	https://github.com/satwikkansal/wtfpython/issues/40
string literal concatenation	https://docs.python.org/2/reference/lexical_analysis.html#string-literal-concatenation
Global Interpreter Lock	https://wiki.python.org/moin/GlobalInterpreterLock
multiprocessing	https://docs.python.org/2/library/multiprocessing.html
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#todo-hell-of-an-example
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#contributing
issue	https://github.com/satwikkansal/wtfpython/issues/new
CONTRIBUTING.md	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/blob/development/CONTRIBUTING.md
issue	https://github.com/satwikkansal/wtfpython/issues/new
channel	https://gitter.im/wtfpython/Lobby
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#acknowledgements
wtfjs	https://github.com/denysdovhan/wtfjs
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#some-nice-links
https://www.youtube.com/watch?v=sH4XF6pKKmk	https://www.youtube.com/watch?v=sH4XF6pKKmk
https://www.reddit.com/r/Python/comments/3cu6ej/what_are_some_wtf_things_about_python	https://www.reddit.com/r/Python/comments/3cu6ej/what_are_some_wtf_things_about_python
https://sopython.com/wiki/Common_Gotchas_In_Python	https://sopython.com/wiki/Common_Gotchas_In_Python
https://stackoverflow.com/questions/530530/python-2-x-gotchas-and-landmines	https://stackoverflow.com/questions/530530/python-2-x-gotchas-and-landmines
https://stackoverflow.com/questions/1011431/common-pitfalls-in-python	https://stackoverflow.com/questions/1011431/common-pitfalls-in-python
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#-license
	http://www.wtfpl.net
Satwik Kansal	https://satwikkansal.xyz
	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#donation
Readme	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#readme-ov-file
WTFPL license	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/blob/master/LICENSE
Code of conduct	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#coc-ov-file
Contributing	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development#contributing-ov-file
Please reload this page	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/tree/development
Activity	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/activity
Custom properties	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/custom-properties
0 stars	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/stargazers
0 watching	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/watchers
0 forks	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/forks
Report repository	https://patch-diff.githubusercontent.com/contact/report-content?content_url=https%3A%2F%2Fgithub.com%2Fprogrammingtips%2Fwtfpython&report=programmingtips+%28user%29
Releases	https://patch-diff.githubusercontent.com/programmingtips/wtfpython/releases
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