Python
/
Goodies
- 1 Language 9
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Hello World S
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Variables S
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Functions S
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Conditional A S
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Operators S
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While S
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Turtle S
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Script Mode S
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Debugging S
- 2 Strings 7
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Slice S
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Raw Strings S
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Regex A S
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Validation S
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Config S
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Security S
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Encrypt A S
- 3 Collections 5
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Lists S
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Dictionaries S
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Efficiency S
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Tuples S
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References S
- 4 Functions 5
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Recursion S
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Factorial S
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Modulus S
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Reassignment S
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Approximate S
- 5 Storage 8
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Files S
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Databases S
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Pipes S
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With open S
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Shelve A S
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Zip S
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Csv S
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Json S
- 6 Class 4
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Definition S
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Attributes S
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Functional S
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Methods S
- 7 Goodies 5
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Conditional Expression S
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List Comprehension S
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Generator S
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Named Tuple S
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Modules S
- 8 Applications 5
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Pythagora A S
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Palindrome A S
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Binary Search A S
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Conway Game A S
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Coin Flip A S
- 9 Scheduler 4
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Time S
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Multithreading A S
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Subprocess S
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Logging S
- 10 Packages 6
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Clipboard A S
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Ocr A S
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Socket S
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Image S
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Virtualenv S
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Jupyter S
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Q
Python Goodies List Comprehension
lst = [v.capitalize() for v in "abc"] lst == [A, B, C]
Loop
p329 Normal use of a for loop.
# Normal use of a for loop ...
#
# without list comprehension
str = "abc"
res = []
for s in str:
res.append(s.capitalize())
assert res == ['A', 'B', 'C']
Comprehension
For loops can be write more concisely using list comprehension.
# List comprehension
#
# The loop variable appears in expression before we get to definition
# List comprehensions are more concise but are harder to debug
str = "abc"
res = [s.capitalize() for s in str]
assert res == ['A', 'B', 'C']
➥ Questions
Last update: 90 days ago