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Drop unused factor levels in a subsetted data frame
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14 Answers
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What is the difference between tree depth and height?
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691
I learned that depth and height are properties of a node:
The depth of a node is the number of...
Best way to store date/time in mongodb
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201
The best way is to store native JavaScript Date objects, which map onto BSON native Date objects...
Union of dict objects in Python [duplicate]
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115
This question provides an idiom. You use one of the dicts as keyword arguments to the dict() c...
Why should I use var instead of a type? [duplicate]
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110
It's really just a coding style. The compiler generates the exact same for both variants.
See...
Using git to get just the latest revision
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Use git clone with the --depth option set to 1 to create a shallow clone with a history truncated to the latest commit.
For example:
git clone --depth 1 https://github.com/user/repo.git
To also initialize and update any nested submodules, also pass --recurse-submodules...
How to parse/read a YAML file into a Python object? [duplicate]
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193
If your YAML file looks like this:
# tree format
treeroot:
branch1:
name: Node 1
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How to validate a url in Python? (Malformed or not)
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10 Answers
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Convert python datetime to epoch with strftime
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415
If you want to convert a python datetime to seconds since epoch you could do it explicitly:
&g...
Plotting time in Python with Matplotlib
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You must first convert your timestamps to Python datetime objects (use datetime.strptime). The...