# How to read, and print to the screen a file in python!
f = open('fileName', 'r')
print(f.read())
f.close()
# Where "fileName" is obviously the name of your file that you want to read.
with open('filename', 'a') as f: # able to append data to file
f.write(var1) # Were var1 is some variable you have set previously
f.write('data')
f.close() # You can add this but it is not mandatory
with open('filename', 'r') as f: # able to read data from file ( also is the default mode when opening a file in python)
with open('filename', 'x') as f: # Creates new file, if it already exists it will cause it to fail
with open('filename', 't') as f: # opens the file in text mode (also is defualt)
with open('filename', 'b') as f: # Use if your file will contain binary data
with open('filename', 'w') as f: # Open file with ability to write, will also create the file if it does not exist (if it exists will cause it to fail)
with open('filename', '+') as f: # Opens file with reading and writing
# You can combine these as you like with the + for reading and writing
fileName = "file_name.txt" #Here you need to write the file name as a string
openLike = "" #Here you need to write how do you want to open the file:
#"w": Write, "r": Read
openedFile = open("file_name.txt", openLike) #Here you open the file
fileText = openedFile.read() #This read all the file
openedFile.close() #Close the file
print(fileText) # Prints the file text
my_file = open("C:UsersPythonfile.txt", "r")
#Give the path accurately and use
text = my_file.read()
print(text)
#Output: The text in file.txt will be printed
#there are many modes you can open files in. r means read.
file = open('C:Usersyournamefilesfile.txt','r')
text = file.read()
#you can write a string to it, too!
file = open('C:Usersyournamefilesfile.txt','w')
file.write('This is a typical string')
#don't forget to close it afterwards!
file.close()
l_a=[]
l_m=[]
l_w=[]
with open("spots.txt","r") as file:
line=file.readlines()
for i in range(0,len(line),1):
[a,m,w]=line[i].split()
l_a.append(float(a))
l_m.append(float(m))
l_w.append(float(w))
l_a=[]
l_m=[]
l_w=[]
with open("spots.txt","r") as file:
line=file.readlines()
for i in range(0,len(line),1):
[a,m,w]=line[i].split()
l_a.append(float(a))
l_m.append(float(m))
l_w.append(float(w))
l_a=[]
l_m=[]
l_w=[]
with open("spots.txt","r") as file:
line=file.readlines()
for i in range(0,len(line),1):
[a,m,w]=line[i].split()
l_a.append(float(a))
l_m.append(float(m))
l_w.append(float(w))
# Open function to open the file "MyFile1.txt"
# (same directory) in append mode and
file1 = open("MyFile.txt","a")
# store its reference in the variable file1
# and "MyFile2.txt" in D:Text in file2
file2 = open(r"D:TextMyFile2.txt","w+")
# write data in a file.
file1 = open("SofthuntFile1.txt","w")
multiple_string = ["This is Mango
","This is Apple
","This is Banana
"]
#
is placed to indicate EOL (End of Line)
file1.write("Hello
")
file1.writelines(multiple_string)
file1.close() #to change file access modes
file1 = open("SofthuntFile1.txt","r+")
print("Output of Read function is ")
print(file1.read())
print()
# seek(n) takes the file handle to the nth
bite from the beginning.
file1.seek(0)
print( "Output of Readline function is ")
print(file1.readline())
print()
file1.seek(0)
# To show difference between read and readline
print("Output of Read(9) function is ")
print(file1.read(9))
print()
file1.seek(0)
print("Output of Readline(9) function is ")
print(file1.readline(9))
file1.seek(0)
# readlines function
print("Output of Readlines function is ")
print(file1.readlines())
print()
file1.close()
>>> f = open("test.txt",'r',encoding = 'utf-8')
>>> f.read(4) # read the first 4 data
'This'
>>> f.read(4) # read the next 4 data
' is '
>>> f.read() # read in the rest till end of file
'my first file
This file
contains three lines
'
>>> f.read() # further reading returns empty sting
''
l_a=[]
l_m=[]
l_w=[]
with open("spots.txt","r") as file:
line=file.readlines()
for i in range(0,len(line),1):
[a,m,w]=line[i].split()
l_a.append(float(a))
l_m.append(float(m))
l_w.append(float(w))