Answer
code
Work Step by Step
# 14.3 (Count the occurrences of each keyword) Write a program that reads in a Python
# source code file and counts the occurrence of each keyword in the file. Your program
# should prompt the user to enter the Python source code filename.
import os.path
import sys
def main():
keyWords = {"and": 0, "as": 0, "assert": 0, "break": 0, "class": 0,
"continue": 0, "def": 0, "del": 0, "elif": 0, "else": 0,
"except": 0, "False": 0, "finally": 0, "for": 0, "from": 0,
"global": 0, "if": 0, "import": 0, "in": 0, "is": 0, "lambda": 0,
"None": 0, "nonlocal": 0, "not": 0, "or": 0, "pass": 0, "raise": 0,
"return": 0, "True": 0, "try": 0, "while": 0, "with": 0, "yield": 0}
filename = input("Enter a Python source code filename: ").strip()
if not os.path.isfile(filename): # Check if target file exists
print("File", filename, "does not exist")
sys.exit()
infile = open(filename, "r") # Open files for input
# text = infile.read().split() # Read and split words from the file
text = infile.readlines()
for i in range(len(text)):
indx = text[i].find(chr(35)) # remove comments, I use chr(35) instead of writing # directly as the # may be used in literal strings
if indx != -1:
line = text[i]
line = line[0:indx]
text[i] = line
for line in text:
for word in line.split():
if word in keyWords:
keyWords[word] += 1
for itm in keyWords:
print(itm, ":", keyWords[itm])
main()
