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@miles-d

miles-d/counter3.py

Created Nov 8, 2020
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What would you like to do?
Count occurences of all 3-character sequences of lowercase letters in a file.
import sys
import string
fname = sys.argv[1]
pairs = {}
char = None
next_char = None
next_next_char = None
chars = []
# add all the lowercase basic alphabet items to pairs
for ch in string.ascii_lowercase:
for ch2 in string.ascii_lowercase:
for ch3 in string.ascii_lowercase:
pairs[ch + ch2 + ch3] = 0
with open(fname) as f:
line = f.readline()
while line:
for ch in line:
last_char = next_char
next_char = next_next_char
next_next_char = ch
if last_char and next_char and next_next_char and last_char.strip() != '' and next_char.strip() != '' and next_next_char.strip() != '':
if last_char + next_char + next_next_char in pairs:
pairs[last_char + next_char + next_next_char ] += 1
else:
pairs[last_char + next_char + next_next_char ] = 1
line = f.readline()
for key, val in pairs.items():
print(str(val) + ' ' + key
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