Working with binary files in Python: Binary Files & Distinction between r/w and rb/wb, writing text to a binary file, PEP 263. djangoSpin. Lakshay Arora. This mode should be used for all files that don’t contain text. You need to reload the python file into ipython with the reload command. bits:n n bits as a new bitstring. Change the file to match what I have here: # Decode Applanix POSPac SBET IMU binary files # You will see this when you load or reload this file, this line will print print "load or reload happening" def decode (): … Hence the "rb" mode opens the file in binary format for reading, while the "wb" mode opens the file in binary format for writing. :) So thank you. uint:n n bits as an unsigned integer. This mode should be used for all files that don’t contain text. This will open a binary file, read its entire contents as an array of bytes, perform whatever manipulation to those bytes the function call does, overwrite the file with the new bytes, then close the file. I registered and stuff just to say thank you. Note. It uses Format Strings as compact descriptions of the layout of the C structs and the intended conversion to/from Python values.
Unlike text mode files, binary files are not human readable.

bin:n n bits as a binary string. This can be used in handling binary data stored in files or from network connections, among other sources. When opened using any text editor, the data is unrecognizable. 'b' appended to the mode opens the file in binary mode: now the data is read and written in the form of bytes objects. :) The python struct docs aren't the greatest for someone like me who's never tried to read a binary file and convert endianness on the fly, and your post directed me to exactly what I needed to read to do it. hex:n n bits as a hexadecimal string.
read(fmt) It reads from current bit position pos in the bitstring according the the format string and returns a single result.. int:n n bits as a signed integer. This is a drive-by post. bytes:n n bytes as bytes … just read the text contents of a binary file and display it to stdout ; Reading a .raw file and display as hex ; Multiple Tree ; vbScript - Convert Integer to Binary String ; Python + Qt on Windows 8.1 ; Frustrating Situation - Setting Variables Globally ; Visual Basic reading text file into array ; Python loop over files in directory then list