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Capturing Groups From a Grep RegEx
...pace. It's awkward to escape and you can't use quotes since that forces it from a regex to an ordinary string. The correct way to do it is to use a variable. Quotes can be used during the assignment making things much simpler.
– Paused until further notice.
Oct...
What is the difference between pylab and pyplot? [duplicate]
...raged and the OO interface is recommended for most non-interactive usage.
From the documentation, the emphasis is mine:
Matplotlib is the whole package; pylab is a module in matplotlib that gets installed alongside matplotlib; and matplotlib.pyplot is a module in matplotlib.
Pyplot provides the st...
What is the best way to call a script from another script?
...tc. I have another script which runs as a service. I want to call test1.py from the script running as a service.
13 Answers...
Should I use past or present tense in git commit messages? [closed]
...
The preference for present-tense, imperative-style commit messages comes from Git itself. From Documentation/SubmittingPatches in the Git repo:
Describe your changes in imperative mood, e.g. "make xyzzy do frotz"
instead of "[This patch] makes xyzzy do frotz" or "[I] changed xyzzy
to do fr...
When is del useful in python?
...eleting a variable, one could just assign None to it. And when deleting from a dictionary, a del method could be added.
...
what’s the difference between Expires and Cache-Control headers?
...
Cache-Control was defined in HTTP/1.1, tells all caching mechanisms from server to client whether they may cache this object. It is measured in seconds: Cache-Control: max-age=3600.
The Expires header field gives the date/time after which the response is considered stale. The Expires value ...
Random “Element is no longer attached to the DOM” StaleElementReferenceException
...tReferenceException e) {
System.out.println("Attempting to recover from StaleElementReferenceException ...");
return getStaleElemById(id);
}
}
Yes, it just keeps polling the element until it's no longer considered stale (fresh?). Doesn't really get to the root of the problem, b...
Shell Script: Execute a python program from within a shell script
...
then run it
$ ./job.sh
Method 2 (BETTER) - Make the python itself run from shell:
Modify your script hello.py and add this as the first line
#!/usr/bin/env python
mark it executable using
$ chmod +x hello.py
then run it
$ ./hello.py
...
Type of conditional expression cannot be determined because there is no implicit conversion between
...has type X and y has type Y then
If an implicit conversion (§6.1) exists from X to Y, but not from Y to X, then Y is the type of the conditional expression.
If an implicit conversion (§6.1) exists from Y to X, but not from X to Y, then X is the type of the conditional expression.
Otherwise, no ...
How do I use arrays in C++?
C++ inherited arrays from C where they are used virtually everywhere. C++ provides abstractions that are easier to use and less error-prone ( std::vector<T> since C++98 and std::array<T, n> since C++11 ), so the need for arrays does not arise quite as often as it does in C. However, ...