Differences

This shows you the differences between two versions of the page.

--- other:python:misc_by_jyp [2024/08/27 11:46] – [Playing with strings] Started a "String formatting sub-section" jypeter
+++ other:python:misc_by_jyp [2025/10/31 11:28] (current) – [Using a decorator to log function calls] jypeter
@@ Line 9: / Line 9: @@
 Only **when you have already read all the content of this page several times**, and you are looking for new ideas
+  * [[https://medium.com/data-science/calculating-distance-between-two-geolocations-in-python-26ad3afe287b|Calculating distance between two geo-locations in Python]]:
+    * ''[[https://github.com/mapado/haversine|haversine]]'', ''[[https://scikit-learn.org/stable/modules/generated/sklearn.metrics.pairwise.haversine_distances.html|haversine_distances]] @ scikit-learn'' and [[https://en.wikipedia.org/wiki/Haversine_formula|Haversine formula]]
+  * Looking at table data with ''pandas''
+    * [[https://blog.devgenius.io/data-profiling-in-python-common-ways-to-explore-your-data-part-1-0efd0dedff75|Summary information]]
+    * [[https://blog.devgenius.io/data-profiling-in-python-common-ways-to-explore-your-data-part-2-396384522e91|More detailed information]]
+    * [[https://blog.devgenius.io/data-cleansing-in-python-common-ways-to-clean-your-data-3459a256dd85|Table data cleaning]]
+  * Stats stuff
+    * [[https://medium.com/@tubelwj/python-outlier-detection-iqr-method-and-z-score-implementation-8e825edf4b32|Python Outlier Detection: IQR Method and Z-score Implementation]]
+  * [[https://medium.com/pythons-gurus/clean-code-in-python-good-vs-bad-practices-examples-2df344bddacc|Clean Code in Python: Good vs. Bad Practices Examples]]
+  * [[https://peps.python.org/pep-0008/|PEP 8 – Style Guide for Python Code]]
+    * [[https://realpython.com/python-pep8/|How to Write Beautiful Python Code With PEP 8]]
+    * [[https://www.datacamp.com/tutorial/pep8-tutorial-python-code|PEP-8 Tutorial: Code Standards in Python]]
+    * Some checkers/linters: [[https://docs.astral.sh/ruff/|ruff]], [[https://flake8.pycqa.org/en/stable/|flake8]]
   * [[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://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 =====
@@ Line 31: / Line 46: @@
+===== 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 =====
@@ Line 48: / Line 71: @@
 ==== 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>
+>>> # Basic (but quick and efficient) printing
 >>> year = 1984
 >>> print(year)
@@ Line 80: / Line 110: @@
 >>> print(f'[ {year:010} 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
+>>> 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))
 [ 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 ====
@@ Line 774: / Line 825: @@
 </code>
+===== Debugging... =====
+Some resources that you can use in the unlikely case that <del>you</del> some AI has introduced <del>features</del> bugs in your code
+==== Built-in tools ====
+Read the documentation of:
+  * [[https://docs.python.org/3/library/pdb.html|pdb, The Python Debugger]]
+  * and the other built-in [[https://docs.python.org/3/library/debug.html|Debugging and Profiling tools]]
+==== Using a decorator to log function calls ====
+Check the example in [[https://blog.devgenius.io/my-lazy-secret-to-cleaner-code-python-decorators-d43d673a1ba2|My Lazy Secret to Cleaner Code: Python Decorators]]
+Note: more about [[#using_log_files_aka_logging|using log files]]
 /*