Python: Difference between revisions
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*[http://www.python.org/ Homepage] | *[http://www.python.org/ Homepage] | ||
*[https://peps.python.org/pep-0008/ PEP 8 – Style Guide for Python Code= | |||
==Documentation== | |||
*[https://docs.python.org/3/ Python 3 documentation] | |||
==Tutorials== | |||
*[https://www.w3schools.com/python/ w3schools] | *[https://www.w3schools.com/python/ w3schools] | ||
*[https://www.tutorialspoint.com/python https://www.tutorialspoint.com/python] | *[https://www.tutorialspoint.com/python https://www.tutorialspoint.com/python] | ||
*[https://wiki.python.org/moin/BeginnersGuide/Programmers Beginners guide] | *[https://wiki.python.org/moin/BeginnersGuide/Programmers Beginners guide] | ||
=HOWTO= | =HOWTO= | ||
==virtual environment== | ==virtual environment (venv)== | ||
===Create virtual environment=== | ===Create virtual environment=== | ||
*https://realpython.com/python-virtual-environments-a-primer/ | |||
python -m venv myvenv | |||
python -m venv | and to activate that | ||
source | source myvenv/bin/activate | ||
and then you can | and then you can | ||
pip install whatever | pip install whatever | ||
| Line 31: | Line 37: | ||
===Link python to python3 on Ubuntu=== | ===Link python to python3 on Ubuntu=== | ||
update-alternatives --install /usr/bin/python python /usr/bin/python3 1 | update-alternatives --install /usr/bin/python python /usr/bin/python3 1 | ||
==Time/datetime== | |||
===Seconds to time=== | |||
from datetime import timedelta | |||
myt = timedelta(seconds = 1000) | |||
print(myt) | |||
==Print== | |||
===Print with decimals=== | |||
first = 2 | |||
second = 3.1415 | |||
print("First: {} second {:.2f}".format(first,second)) | |||
=Data types= | =Data types= | ||
| Line 49: | Line 67: | ||
=FAQ= | =FAQ= | ||
==Leave virtualenv== | |||
deactivate | |||
==Python shebang== | |||
#!/usr/bin/env python3 | |||
==Error messages== | |||
==-bash: python: command not found== | ==-bash: python: command not found== | ||
Try | Try | ||
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update-alternatives --install /usr/bin/python python $(which python3) 1 | update-alternatives --install /usr/bin/python python $(which python3) 1 | ||
[[Category:Programming]] | [[Category:Programming]] | ||
Latest revision as of 12:34, 12 May 2026
Links
- Homepage
- [https://peps.python.org/pep-0008/ PEP 8 – Style Guide for Python Code=
Documentation
Tutorials
HOWTO
virtual environment (venv)
Create virtual environment
python -m venv myvenv
and to activate that
source myvenv/bin/activate
and then you can
pip install whatever
Leave venv
deactivate
Listen on http
python3 -m http.server 8080
Leave virtual environment
deactivate
Link python to python3 on Ubuntu
update-alternatives --install /usr/bin/python python /usr/bin/python3 1
Time/datetime
Seconds to time
from datetime import timedelta myt = timedelta(seconds = 1000) print(myt)
Print with decimals
first = 2
second = 3.1415
print("First: {} second {:.2f}".format(first,second))
Data types
Tuples
Tuples methods
Regex
Strings
Length of string
len(s)
Lists
List operators
Regular expressions
https://docs.python.org/3/library/re.html
FAQ
Leave virtualenv
deactivate
Python shebang
#!/usr/bin/env python3
Error messages
-bash: python: command not found
Try
update-alternatives --config python
update-alternatives: error: no alternatives for python
update-alternatives --install /usr/bin/python python $(which python3) 1
