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Replace None with NaN in pandas dataframe

... You can use DataFrame.fillna or Series.fillna which will replace the Python object None, not the string 'None'. import pandas as pd import numpy as np For dataframe: df = df.fillna(value=np.nan) For column or series: df.mycol.f...
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How do I create a directory from within Emacs?

How exactly can I create a new directory using Emacs? What commands do I use? (If possible, please provide an example) 6 An...
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How to add a WiX custom action that happens only on uninstall (via MSI)?

...e and the values they have for various installation scenarios: So in my case I wanted a CA that will run only on uninstalls - not upgrades, not repairs or modifies. According to the table above I had to use <Custom Action='CA_ID' Before='other_CA_ID'> (NOT UPGRADINGPRODUCTCODE) AN...
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Search for selection in vim

...myself wanting to search for a string within a function, for example every call to object->public_member.memberfunc() . ...
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Turn off spell checking in Eclipse for good

... It's not a perfect fix, but you can copy existing workspace preferences into any workspace. I keep a separate .epf (Eclipse preferences file, I guess) that I just import into every new workspace I create: File → Import... → General → Preferences → N...
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How to convert ActiveRecord results into an array of hashes

...records = TaskStoreStatus.all tasks_records = tasks_records.as_json # You can now add new records and return the result as json by calling `to_json` tasks_records << TaskStoreStatus.last.as_json tasks_records << { :task_id => 10, :store_name => "Koramanagala", :store_region =>...
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Is it possible for a unit test to assert that a method calls sys.exit()

I have a python 2.7 method that sometimes calls 4 Answers 4 ...
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How do I use WebRequest to access an SSL encrypted site using https?

... may be providing urls to sites that have invalid SSL certs installed. You can ignore those cert problems if you put this line in before you make the actual web request: ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(AcceptAllCe...
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How to convert timestamp to datetime in MySQL?

... Just because I've done this and been confused at the output: MySQL stores Unix time in seconds, whereas a lot of other frameworks store it in milliseconds (i.e. Java's timestamp). So just remember to divide by 1000 if you're using t...
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Can Vim highlight matching HTML tags like Notepad++?

...kle this. Added a ftplugin to vim.org that should solve your problem. You can get it here on vim.org. You can get it here on github. Hope it works for you. Let me know if you have any problems. share | ...