file write mode code example

Example 1: python file open modes

r for reading
r+ opens for reading and writing (cannot truncate a file)
w for writing
w+ for writing and reading (can truncate a file)
rb for reading a binary file. The file pointer is placed at the beginning of the file.
rb+ reading or writing a binary file
wb+ writing a binary file
a+ opens for appending
ab+ Opens a file for both appending and reading in binary. The file pointer is at the end of the file if the file exists. The file opens in the append mode.
x open for exclusive creation, failing if the file already exists (Python 3)

Example 2: python how to make a file to write to

# Basic syntax:
file_object = open("filename", "mode")
file_object.write("Data to be written")
file_object.close() 

# Example usage:
file_object = open("/path/to/my_filename.txt", "w") # w = write, r = read
file_object.write("Line of text to write")
file_object.close()