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Difference between del, remove and pop on lists
... = [4, 5, 6]
>>> a.remove(7)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: list.remove(x): x not in list
>>> del a[7]
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
IndexError: list assignment ...
Iterate over the lines of a string
...string being in memory. It would be better just to read the string from a file, which already allows you to iterate through it as lines.
However if you do have a huge string in memory already, one approach would be to use StringIO, which presents a file-like interface to a string, including allowi...
How do you parse and process HTML/XML in PHP?
...ample can be found at A simple program to CRUD node and node values of xml file and there is lots of additional examples in the PHP Manual.
3rd Party Libraries (libxml based)
If you prefer to use a 3rd-party lib, I'd suggest using a lib that actually uses DOM/libxml underneath instead of string ...
How can I swap positions of two open files (in splits) in vim?
Assume I've got some arbitrary layout of splits in vim.
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Most pythonic way to delete a file which may not exist
I want to delete the file filename if it exists. Is it proper to say
13 Answers
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How to make “if not true condition”?
...e will jump up and down and cry gothca! I'll just say that grep can take a file name on its cmd-line, so why invoke extra processes and pipe constructions when you don't have to? ;-)
I hope this helps.
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How to find serial number of Android device?
...PHONE_STATE"></uses-permission> permission in androidManifest.xml file.
– Paresh Mayani
Aug 26 '10 at 11:54
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pandas read_csv and filter columns with usecols
I have a csv file which isn't coming in correctly with pandas.read_csv when I filter the columns with usecols and use multiple indexes.
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Is there a short cut for going back to the beginning of a file by vi editor?
When reading a long file by vi editor, it would be very nice to get back to the beginning of the file by some short cuts when you really need to do so. Even ctrl + B sometimes is too slow. Does anyone know such a tool?
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Copy/duplicate database without using mysqldump
...sqldump and mysql from bash becomes much simpler if you set up you .my.cnf file to store your user/host/password files
– ErichBSchulz
Nov 11 '12 at 4:33
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