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How does collections.defaultdict work?
I've read the examples in python docs, but still can't figure out what this method means. Can somebody help? Here are two examples from the python docs
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Apply multiple functions to multiple groupby columns
The docs show how to apply multiple functions on a groupby object at a time using a dict with the output column names as the keys:
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JavaScript function to add X months to a date
I’m looking for the easiest, cleanest way to add X months to a JavaScript date.
18 Answers
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Ruby: How to turn a hash into HTTP parameters?
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Getting a list of values from a list of dicts
I have a list of dicts like this:
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pandas: filter rows of DataFrame with operator chaining
Most operations in pandas can be accomplished with operator chaining ( groupby , aggregate , apply , etc), but the only way I've found to filter rows is via normal bracket indexing
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Paste multiple columns together
I have a bunch of columns in a dataframe which I want to paste together (seperated by "-") as follows:
10 Answers
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What is the difference between dict.items() and dict.iteritems() in Python2?
Are there any applicable differences between dict.items() and dict.iteritems() ?
10 Answers
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How to check if a value exists in a dictionary (python)
I have the following dictionary in python:
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Get the date (a day before current time) in Bash
How can I print the date which is a day before current time in Bash?
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