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Efficient way to remove keys with empty strings from a dict
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Python 2.X
dict((k, v) for k, v in metadata.iteritems() if v)
Python 2.7 - 3.X
{k: v for k, v in metadata.items() if v is not None}
Note that all of your keys have values. It's just that some of those values are the empty s...
What is a Python equivalent of PHP's var_dump()? [duplicate]
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287
To display a value nicely, you can use the pprint module. The easiest way to dump all variable...
Read an Excel file directly from a R script
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12 Answers
12
Active
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Print PHP Call Stack
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126
If you want to generate a backtrace, you are looking for debug_backtrace and/or debug_print_bac...
AutoMapper: “Ignore the rest”?
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Can GencerCan Gencer
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Selenium: FirefoxProfile exception Can't load the profile
Per this previous question I updated Selenium to version 2.0.1
But now I have another error, even when the profile files exist under /tmp/webdriver-py-profilecopy :
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Accessing inactive union member and undefined behavior?
...ough a union, whereas C++ (c++11) has no such permission.
c11
6.5.2.3 Structure and union members
95) If the member used to read the contents of a union object is not the same as the member last used to
store a value in the object, the appropriate part of the object representation of...
Is there a Pattern Matching Utility like GREP in Windows?
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32 Answers
32
Active
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Bash if statement with multiple conditions throws an error
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251
Use -a (for and) and -o (for or) operations.
tldp.org/LDP/Bash-Beginners-Guide/html/sect_07_0...
Change the current directory from a Bash script
...adding this line:
# . ~/bin/myprog.sh
#
function myprog() {
A=$1
B=$2
echo "aaa ${A} bbb ${B} ccc"
cd /proc
}
The reason is that each process has its own current directory, and when you execute a program from the shell it is run in a new process. The standard "cd", "pushd" and "popd" ar...