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How to extract a floating number from a string [duplicate]
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Python docs has an answer that covers +/-, and exponent notation
scanf() Token Regular Expression
%e, %E, %f, %g [-+]?(\d+(\.\d*)?|\.\d+)([eE][-+]?\d+)?
%i [-+]?(0[xX][\dA-Fa-f]+|0[0-7]*|\d+)
This ...
data type not understood
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How do I get the object if it exists, or None if it does not exist?
...the DoesNotExist exception every time.
The idiomatic way to handle this in python is to wrap it in a try catch:
try:
go = SomeModel.objects.get(foo='bar')
except SomeModel.DoesNotExist:
go = None
What I did do, is to subclass models.Manager, create a safe_get like the code above and use t...
Go install fails with error: no install location for directory xxx outside GOPATH
...uages do in fact use these, but maybe they're not as visible. For example, Python (a language famous for its simplicity) has PYTHONHOME instead of GOROOT and PYTHONPATH instead of GOPATH. Even (GC)C has LIBRARY_PATH, C_INCLUDE_PATH, etc.
– Hut8
Jan 31 '16 at 0:...
How to access command line parameters?
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This is where clap-rs comes in handy.
It feels a bit like argparse from Python.
Here is an example of how it looks like:
let matches = App::new("myapp")
.version("1.0")
.author("Kevin K. <kbknapp@gmail.com>")
.about("Does aw...
In Django, how do I check if a user is in a certain group?
...er suggestions, like getting all the users in a group and doing a standard python user in groups (or vice versa).
– brianmearns
Dec 12 '13 at 15:32
1
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Diff Algorithm? [closed]
... plain text. ... Currently available
in Java, JavaScript, C++, C# and
Python"
Also see the wikipedia.org Diff page and - "Bram Cohen: The diff problem has been solved"
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dropping infinite values from dataframes in pandas?
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python 2.7 and higher support dict comprehensions: {v: lst for v in cols}
– Aryeh Leib Taurog
Feb 17 '15 at 8:01
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What is the significance of #pragma marks? Why do we need #pragma marks?
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Is there a Python equivalent?
– Edward Falk
Jan 31 '19 at 0:04
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Why is it recommended to have empty line in the end of a source file?
...le. Several text editors, like Vim, and several compilers (notably C++ and Python) will issue warnings. (In C++'s case, the standard explicitly requires this.)
– greyfade
Nov 26 '16 at 8:08
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