lines = open("integrals.py").readlines()

lengths = [] # Like an accumulator
for line in lines:
    lengths.append(len(line))
print(lengths)

# We've got two lists
# lengths and lines
# Processes both at once?

for line, length in zip(lines, lengths):
    print(str(length) + ": " + line[:-1] )

# With line numbers this time
# This works
for line, number in zip(lines, range(len(lines))):
    print(str(number) + ": " + line[:-1] )

# This is easier
for number, line in enumerate(lines):
    print(str(number) + ": " + line[:-1] )
    # lines[number] == line # This is true

# Traditional
for i in range(len(lines)):
    print(str(i) + ": " + lines[i][:-1] )