In Python, files are opened with the open command. The open command takes two parameters.
\nThe first parameter is the file name. The second parameter is the mode to open the file in:<\/p>\n
<\/pre>\n\nr – Open the file for reading. An error is thrown if the file does not exist.
\na – Open the file for appending to the end of it. The file is created if it doesn’t exist.
\nw – Open the file for writing to it. The file is created if it doesn’t exist.
\nx – Create the file. An error is thrown if the file exists.<\/p>\nt – Open the file as a text file. By default, files are opened in text mode.
\nb – Open the file as a binary file.<\/p>\n<\/p>\n
\nText Files<\/h2>\n
<\/p>\n
\nReading<\/h3>\n
Reading a file using Python is done as follows:<\/p>\n
<\/pre>\n\nf = open(‘test.txt’, ‘r’)
\nf.close()<\/p>\n\nIn the above example, f.close(), will close the file when it’s done being read from.
\nFiles may also be opened using a with statement. When using the with statement, f.close() is automatically called:<\/p>\n<\/pre>\n\nwith open(‘test.txt’, ‘r’) as file:
\n data = file.read()<\/p>\n\nTo read from a file, do the following:<\/p>\n
<\/pre>\n\nwith open(‘test.txt’, ‘r’) as f:
\n data = f.read()<\/p>\n\nRead a certain number of characters:<\/p>\n
<\/pre>\n\nwith open(‘test.txt’, ‘r’) as f:
\n data = f.read()<\/p>\n\nRead a single line:<\/p>\n
<\/pre>\n\nwith open(‘test.txt’, ‘r’) as f:
\n data = f.readline()<\/p>\n\nRead the entire file:<\/p>\n
<\/pre>\n\nwith open(‘test.txt’, ‘r’) as f:
\n for data in f:
\n print(data)<\/p>\n<\/p>\n
\nWriting<\/h3>\n
<\/pre>\n\nwith open(‘test.txt’, ‘w’) as f:
\n f.write(‘Writing some text content in a file’)<\/p>\n<\/p>\n
\nBinary Files<\/h2>\n
\nReading<\/h3>\n
<\/pre>\n\nwith open(‘test.txt’, ‘rb’) as f:
\n data = f.read()<\/p>\n<\/p>\n
\nWriting<\/h3>\n
<\/pre>\n\nwith open(‘test.txt’, ‘wb’) as f:
\n f.write(“Writing some binary content in a filen”.encode(‘utf8’))<\/p>\n<\/p>\n
\nGo to a position<\/h3>\n
<\/pre>\n\nwith open(‘test.txt’, ‘rb’) as f:
\n data = f.seek(10, 20)<\/p>\n