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How to estimate how much memory a Pandas' DataFrame will need?

I have been wondering... If I am reading, say, a 400MB csv file into a pandas dataframe (using read_csv or read_table), is there any way to guesstimate how much memory this will need? Just trying to get a better feel of data frames and memory... ...
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Tool to read and display Java .class versions

... It is easy enough to read the class file signature and get these values without a 3rd party API. All you need to do is read the first 8 bytes. ClassFile { u4 magic; u2 minor_version; u2 major_version; For class file version 51.0 (J...
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How to send email attachments?

...n(f, "rb") as fil: part = MIMEApplication( fil.read(), Name=basename(f) ) # After the file is closed part['Content-Disposition'] = 'attachment; filename="%s"' % basename(f) msg.attach(part) smtp = smtplib.SMTP(serv...
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Parsing CSV files in C#, with header

... @MarcosMeli many thanks! I already used FileHelpers in one of my projects and it was a breeze to use - kudos to the team. I'm planning a blog on it soon and btw - Love the new site - well done! – Sudhanshu Mishra Ju...
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Displaying the build date

... using (var stream = new FileStream(filePath, FileMode.Open, FileAccess.Read)) stream.Read(buffer, 0, 2048); var offset = BitConverter.ToInt32(buffer, c_PeHeaderOffset); var secondsSince1970 = BitConverter.ToInt32(buffer, offset + c_LinkerTimestampOffset); var epoch = new Dat...
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Convert Unicode to ASCII without errors in Python

...open("https://example.com/gzipped-ressource") buffer = io.BytesIO(response.read()) # Use StringIO.StringIO(response.read()) in Python 2 gzipped_file = gzip.GzipFile(fileobj=buffer) decoded = gzipped_file.read() content = decoded.decode("utf-8") # Replace utf-8 with the source encoding of your reques...
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ProcessStartInfo hanging on “WaitForExit”? Why?

... use, there can be a problem: If you wait for the process to exit before reading StandardOutput the process can block trying to write to it, so the process never ends. If you read from StandardOutput using ReadToEnd then your process can block if the process never closes StandardOutput (for exampl...
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How to read from stdin line by line in Node

... You can use the readline module to read from stdin line by line: var readline = require('readline'); var rl = readline.createInterface({ input: process.stdin, output: process.stdout, terminal: false }); rl.on('line', function(line){ ...
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Saving and loading objects and using pickle

...n load encoding=encoding, errors=errors).load() EOFError After you have read the contents of the file, the file pointer will be at the end of the file - there will be no further data to read. You have to rewind the file so that it will be read from the beginning again: file.seek(0) What you us...
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How to make good reproducible pandas examples

...o get some help on putting together these examples. People who are able to read these guides and come back with reproducible data will often have much better luck getting answers to their questions. ...