How to read a single character at a time from a file in Python?

with open(filename) as f:
  while True:
    c = f.read(1)
    if not c:
      print "End of file"
      break
    print "Read a character:", c

First, open a file:

with open("filename") as fileobj:
    for line in fileobj:  
       for ch in line: 
           print(ch)

This goes through every line in the file and then every character in that line.

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