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Dealing with multiple Python versions and PIP?

...This is the recommendation because it works across all versions of Python, and in all forms of virtualenv. For example: # The system default python: $ python -m pip install fish # A virtualenv's python: $ .env/bin/python -m pip install fish # A specific version of python: $ python-3.6 -m pip inst...
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Is it possible to declare two variables of different types in a for loop?

...se a structured binding declaration. The syntax has been supported in gcc and clang for years (since gcc-7 and clang-4.0) (clang live example). This allows us to unpack a tuple like so: for (auto [i, f, s] = std::tuple{1, 1.0, std::string{"ab"}}; i < N; ++i, f += 1.5) { // ... } The above...
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Are lists thread-safe?

...t is often suggested to use queues with multiple threads, instead of lists and .pop() . Is this because lists are not thread-safe, or for some other reason? ...
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how do I make a single legend for many subplots with matplotlib?

... There is also a nice function get_legend_handles_labels() you can call on the last axis (if you iterate over them) that would collect everything you need from label= arguments: handles, labels = ax.get_legend_handles_labels() fig.legend(handles, labels, loc='upper c...
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Convert Pandas column containing NaNs to dtype `int`

I read data from a .csv file to a Pandas dataframe as below. For one of the columns, namely id , I want to specify the column type as int . The problem is the id series has missing/empty values. ...
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How can I create a two dimensional array in JavaScript?

I have been reading online and some places say it isn't possible, some say it is and then give an example and others refute the example, etc. ...
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Extending from two classes

... You can only Extend a single class. And implement Interfaces from many sources. Extending multiple classes is not available. The only solution I can think of is not inheriting either class but instead having an internal variable of each class and doing more o...
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Ruby on Rails and Rake problems: uninitialized constant Rake::DSL

... A tweet from DHH earlier. Rake .9.0 breaks Rails and several other things, you need to: gem "rake", "0.8.7" in your Gemfile. share | improve this answer | ...
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nginx - client_max_body_size has no effect

nginx keeps saying client intended to send too large body . Googling and RTM pointed me to client_max_body_size . I set it to 200m in the nginx.conf as well as in the vhost conf , restarted Nginx a couple of times but I'm still getting the error message. ...
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How to simulate a touch event in Android?

How to simulate a touch event with Android while giving the X and Y coordinates manually? 7 Answers ...