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File_Reading.py
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File_Reading.py
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############ Open(), Read() & Readline() For Reading File #########
# file pointer(here f) returned by open function is used to read/write in file
# "rt" is default mode so it is optional to write
# Below is same as f = open("24. Tutorial.txt")
f = open("TUT_File_Reading.txt", "rt")
content = f.read()
print(content)
f.close()
# Good practice to close opened files
# Technically it is to frees/release all the resources
# using by file when it is open.
## Reading in binary mode
f = open("TUT_File_Reading.txt", "rb")
content = f.read()
print(content)
f.close()
## Reading fixed length of characters
f = open("TUT_File_Reading.txt", "rt")
content = f.read(4)
print(content)
content = f.read(4)
print(content)
f.close()
# Reading more than available characters
f = open("TUT_File_Reading.txt", "rt")
content = f.read(344555)
# It will print till available character
print("1 :",content)
content = f.read(344555)
# Nothing left to read now
print("2 :",content)
f.close()
## Printing character by character in each line
f = open("TUT_File_Reading.txt", "rt")
content = f.read()
for line in content:
print(line)
f.close()
# Output :
# W
# e
# a
# r
# e
# o
# n
# ...............
## Printing line by line using itreater in file
f = open("TUT_File_Reading.txt", "rt")
content = f.read()
for line in f:
print(line)
f.close()
# Output : Nothing because content has already read the file
f = open("TUT_File_Reading.txt", "rt")
# content = f.read()
for line in f:
print(line)
f.close()
# Output : (print by default give a backslash end character and file also have new line charcter when we write next line in file)
# We are on a mission to transform and Optimize World with Indian Technologies.
# We will work hard.
# We will win.
f = open("TUT_File_Reading.txt", "rt")
# content = f.read()
for line in f:
print(line,end="")
f.close()
# Output : (print bydefault give a backslash end character)
# We are on a mission to transform and Optimize World with Indian Technologies.
# We will work hard.
# We will win.
##### readline function to read one line a time
f = open("TUT_File_Reading.txt", "rt")
print(f.readline())
f.close()
# Output :
# We are on a mission to transform and Optimize World with Indian Technologies.
f = open("TUT_File_Reading.txt", "rt")
print(f.readline())
print(f.readline())
print(f.readline())
f.close()
########## Readlines Function to get list of lines.
f = open("TUT_File_Reading.txt", "rt")
print(f.readlines())
f.close()