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In this article, we will be learning different approaches to count the number of times a letter appears in a text file in Python. Below is the content of the text file gfg.txt that we are going to use in the below programs:
Now we will discuss various approaches to get the frequency of a letter in a text file.
Method 1: Using the in-built count[] method.
Approach:
- Read the file.
- Store the content of the file in a variable.
- Use the count[] method with the argument as a letter whose frequency is required.
- Display the count of the letter.
Implementation:
Python3
def letterFrequency[fileName, letter]:
file = open[fileName, 'r']
text = file.read[]
return text.count[letter]
print[letterFrequency['gfg.txt', 'g']]
Output:
Method 2: Iterate through the file content in order to compare each character with the given letter.
Approach:
- Read the file.
- Store the content of the file in a variable.
- Assign a counter count variable with 0.
- Iterate through each character, if the character is found to be the given letter then increment the counter.
- Display the count of the letter.
Implementation:
Python3
def letterFrequency[fileName, letter]:
file = open[fileName, "r"]
text = file.read[]
count = 0
for char in text:
if char == letter:
count += 1
return count
print[letterFrequency['gfg.txt', 'g']]
Output:
Ques . WAP to count frequency of characters in a given file.Can u use character frequency to test whether the given file is Python program file, C program file or a text file
Answer :
Program -1
f="C:\\Users\\HP\\Desktop\\g.txt"
file = open [ f, "r" ]
a=[]
b={}
for i in file:
for j in range[0,len[i]]:
a.append[i[j]]
for i in a:
if i in b:
b[i]+=1
else:
b[i]=1
print[b]
c=f.split["."]
if c[1]=="txt":
print["\n\nit is a text file"]
elif c[1]=="cpp":
print["\n\nit is a c++ file"]
else:
print["\n\nit is a c file"]
Output 1 :
{'g': 2, 'o': 7, 'e': 12, 'd': 4, 'u': 5, 'h': 1, 'b': 1, ' ': 13, 'w': 4, 'l': 3, 'c': 1, 'm': 3, 's': 4, 'y': 1, '!': 3, '\n': 2, 'p': 2, 'r': 7, 'v': 2, 'i': 7, 'f': 1, 'n': 6, 't': 4, 'a': 3}
it is a text file
Program 2 :
import collections
import pprint
file_input = "D:\\Komal\\n1\\goeduhub\\python.txt"
with open[file_input, 'r'] as info:
count = collections.Counter[info.read[].upper[]]
value = pprint.pformat[count]
print[value]
a=file_input.split["."]
if a[1]=="txt":
print["it is a text file"]
elif a[1]=="cpp":
print["it is a c++ file"]
else:
print["it is a c file"]
Output 2 :
Counter[{' ': 25,
'E': 21,
'I': 16,
'N': 16,
'O': 15,
'T': 12,
'S': 11,
'L': 10,
'.': 9,
'U': 8,
'R': 8,
'A': 8,
'W': 7,
'D': 6,
',': 6,
'G': 5,
'H': 5,
'M': 5,
'V': 5,
'C': 4,
'P': 4,
'\n': 3,
'Q': 3,
'F': 2,
'1': 1,
'B': 1,
'2': 1,
'3': 1,
'Y': 1,
'4': 1}]
it is a text file