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How to check if string input is a number? [duplicate]
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The method isnumeric() will do the job (Documentation for python3.x):
>>>a = '123'
>>>a.isnumeric()
True
But remember:
>>>a = '-1'
>>>a.isnumeric()
False
isnumeric() returns True if all characters in the string are numeric characters, and th...
How to format a floating number to fixed width in Python
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In python3 the following works:
>>> v=10.4
>>> print('% 6.2f' % v)
10.40
>>> print('% 12.1f' % v)
10.4
>>> print('%012.1f' % v)
0000000010.4
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How to print a percentage value in python?
...0%}".format(1./3)
33%
If you don't want integer division, you can import Python3's division from __future__:
>>> from __future__ import division
>>> 1 / 3
0.3333333333333333
# The above 33% example would could now be written without the explicit
# float conversion:
>>>...
ipython reads wrong python version
...tall ipython
(venv2.7)$ ipython
for python 3.4
$ virtualenv -p /usr/bin/python3.4 venv3.4
$ source venv3.4/bin/activate
(venv3.4)$ pip install ipython
(venv3.4)$ ipython
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Linux command to print directory structure in the form of a tree
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for python3 I found find . |grep -vE 'pyc|swp|__init' | sed -e "s/[^-][^\/]*\// |/g" -e "s/|\([^ ]\)/|-\1/" working well
– patroqueeet
May 20 at 9:55
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How do I update a Python package?
...ely upgrades packages that don't break change. Compatible with Python2.7+, Python3.4+ and pip9+, pip10+, pip18+.
NOTE: I'm the author of the tool.
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Getting command-line password input in Python
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15.7. getpass — Portable password input
#!/usr/bin/python3
from getpass import getpass
passwd = getpass("password: ")
print(passwd)
You can read more here
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Why does @foo.setter in Python not work for me?
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In Python3 it's necessary no more - "classic" classes are just ok with setters :-)
– Eenoku
Jun 12 '15 at 9:16
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Relative imports in Python 2.7
...quirk. If you run this whole thing from outside:
$ python2 lib.foo
or:
$ python3 lib.foo
the behavior depends on the contents of lib/__init__.py. If that exists and is empty, all is well:
Package named 'lib'; __name__ is '__main__'
But if lib/__init__.py itself imports routine so that it can ex...
Alarm 闹钟扩展 · App Inventor 2 中文网
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Alarm 闹钟扩展
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.aix拓展文件：
de.ullisroboterseite.ursai2alarm.aix
.aia示例文件：
UrsAlarmTest.aia
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