work with fileread function in python 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 write file

with open("file.txt", "w") as file:
  for line in ["hello", "world"]:
    file.write(line)

Example 3: read and write to file python

file = open(“testfile.txt”, “r+”)