other:python:misc_by_jyp
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other:python:misc_by_jyp [2024/08/27 09:46] jypeter [Playing with strings] Started a "String formatting sub-section" |
other:python:misc_by_jyp [2024/09/25 13:37] (current) jypeter [Extra tutorials] Multithreading and Multiprocessing tuto |
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| * [[https://medium.com/@yaduvanshineelam09/ultimate-python-cheat-sheet-practical-python-for-everyday-tasks-8a33abc0892f|Ultimate Python Cheat Sheet: Practical Python For Everyday Tasks]] | * [[https://medium.com/@yaduvanshineelam09/ultimate-python-cheat-sheet-practical-python-for-everyday-tasks-8a33abc0892f|Ultimate Python Cheat Sheet: Practical Python For Everyday Tasks]] | ||
| * [[https://medium.com/pythoneers/16-hacks-that-will-take-your-python-skills-to-the-next-level-12e7a9b97421|16 Hacks That Will Take Your Python Skills to the Next Level]] | * [[https://medium.com/pythoneers/16-hacks-that-will-take-your-python-skills-to-the-next-level-12e7a9b97421|16 Hacks That Will Take Your Python Skills to the Next Level]] | ||
| + | * [[https://levelup.gitconnected.com/modular-coding-in-python-finally-solve-your-import-errors-af2fd172fcf7|Modular Coding in Python: Finally Solve your Import Errors]] (understanding and fixing ModuleNotFoundError and ImportError) | ||
| + | * [[https://medium.com/@moraneus/understanding-multithreading-and-multiprocessing-in-python-1ed39bb078d5|Understanding Multithreading and Multiprocessing in Python]] | ||
| ===== Reading/setting environments variables ===== | ===== Reading/setting environments variables ===== | ||
| Line 31: | Line 33: | ||
| + | ===== Using log files (aka logging) ===== | ||
| + | |||
| + | It is always possible to display information messages using the ''print()'' command, but it is more efficient to use //logging// tools when you want to **display correctly a lot of information about a script progress | ||
| + | ** | ||
| + | * [[https://loguru.readthedocs.io/|Loguru]] is a library which aims to bring enjoyable logging in Python | ||
| + | * See also [[https://betterstack.com/community/guides/logging/loguru/|A Complete Guide to Logging in Python with Loguru]] | ||
| + | * More on [[https://betterstack.com/community/guides/logging/#python|logging with python]] | ||
| + | * The default (but not easy to use) Python ''[[https://docs.python.org/3/library/logging.html|logging]]'' module | ||
| ===== Stopping a script ===== | ===== Stopping a script ===== | ||
| Line 48: | Line 58: | ||
| ==== String formatting ==== | ==== String formatting ==== | ||
| - | Knowing how to display/print a string correctly is always useful for information and debugging purpose, and there are lots of different ways to display strings | + | * Knowing how to display/print a string correctly is always useful for information and debugging purpose |
| + | * There are lots of different ways to display strings | ||
| + | |||
| + | === String formatting examples === | ||
| + | |||
| + | You will find below some examples of //quick printing//, as well as using //old style formatting//, //formatted string literals (f-strings)// and the //String ''format()'' Method//. More details in the next section | ||
| <code python> | <code python> | ||
| + | >>> # Basic (but quick and efficient) printing | ||
| + | |||
| >>> year = 1984 | >>> year = 1984 | ||
| >>> print(year) | >>> print(year) | ||
| Line 80: | Line 97: | ||
| >>> print(f'[ {year:010} is a famous book ]') | >>> print(f'[ {year:010} is a famous book ]') | ||
| [ 0000001984 is a famous book ] | [ 0000001984 is a famous book ] | ||
| + | >>> print(f'[ {year:10.2f} is a famous book (yes, {year}!) ]') | ||
| + | [ 1984.00 is a famous book (yes, 1984!) ] | ||
| >>> # The String format() Method | >>> # The String format() Method | ||
| + | >>> print('[ {} is a famous book ]'.format(year)) | ||
| + | [ 1984 is a famous book ] | ||
| + | >>> print('[ {:10} is a famous book ]'.format(year)) | ||
| + | [ 1984 is a famous book ] | ||
| + | >>> print('[ {:<10} is a famous book ]'.format(year)) | ||
| + | [ 1984 is a famous book ] | ||
| >>> print('[ {:010} is a famous book ]'.format(year)) | >>> print('[ {:010} is a famous book ]'.format(year)) | ||
| [ 0000001984 is a famous book ] | [ 0000001984 is a famous book ] | ||
| - | >>> print('[ {:010d} is a famous book ]'.format(year)) | + | >>> print('[ {:10.2f} is a famous book (yes, {}!) ]'.format(year, year)) |
| - | [ 0000001984 is a famous book ] | + | [ 1984.00 is a famous book (yes, 1984!) ] |
| - | >>> print('[ {:10d} is a famous book ]'.format(year)) | + | >>> print('[ {title:10.2f} is a famous book (yes, {title}!) ]'.format(title=year)) |
| - | [ 1984 is a famous book ] | + | [ 1984.00 is a famous book (yes, 1984!) ] |
| - | >>> print('[ {:10f} is a famous book ]'.format(year)) | + | >>> print('[ {title:10.2e} is a famous book ]'.format(title=year)) |
| - | [ 1984.000000 is a famous book ] | + | [ 1.98e+03 is a famous book ]</code> |
| - | >>> print('[ {:10.2f} is a famous book ]'.format(year)) | + | |
| - | [ 1984.00 is a famous book ]</code> | + | === String formatting references === |
| + | |||
| + | * [[https://docs.python.org/3/tutorial/inputoutput.html#formatted-string-literals|Formatted String Literals]] (//f-strings//) | ||
| + | * Available in Python >= 3.6 | ||
| + | * [[https://docs.python.org/3/reference/lexical_analysis.html#f-strings|More documentation]] | ||
| + | * [[https://docs.python.org/3/library/string.html#formatspec|Format Specification Mini-Language]] | ||
| + | * See also the [[https://pyformat.info/|PyFormat site]] | ||
| + | |||
| + | * [[https://docs.python.org/3/tutorial/inputoutput.html#the-string-format-method|The String format() Method]] | ||
| + | * [[https://docs.python.org/3/library/string.html#formatspec|Format Specification Mini-Language]] | ||
| + | * See also the [[https://pyformat.info/|PyFormat site]] | ||
| + | * [[https://pyformat.info/|PyFormat site]]: string formatting using the //old style// and the //String ''format()'' method// | ||
| + | * <wrap hi>Hint</wrap>: this can also be used as an **easy documentation for //f-strings// format**! | ||
| + | * [[https://docs.python.org/3/tutorial/inputoutput.html#the-string-format-method|Old string formatting]] | ||
| ==== Splitting (complex) strings ==== | ==== Splitting (complex) strings ==== | ||
other/python/misc_by_jyp.1724751978.txt.gz · Last modified: 2024/08/27 09:46 by jypeter
