| Mode | Meaning of Mode | During Inexistence of file |
|---|---|---|
| r/rb | Open text/binary for reading. | If the file does not exist, open() returns None. |
| w/wb | Open text/binary for writing. | If the file exists, its contents are overwritten. If the file does not exist, it will be created. |
| a/ab | Open text/binary for append. i.e, Data is added to end of file. | If the file does not exists, it will be created. |
| r+/rb+ | Open text/binary for both reading and writing. | If the file does not exist, open() returns None. |
| w+/wb+ | Open text/binary for both reading and writing. | If the file exists, its contents are overwritten. If the file does not exist, it will be created. |
| Method: | |
|---|---|
| read([size]) |
|
| readline( ) |
|
| readlines( ) | Return a list containing the lines. |
| write(data) | Writes a data to the file. |
| writelines(collection) | Writes a sequence of strings to the file. |
| seek(offset[, whence]) |
|
| tell( ) | Returns the file's current position. |
| truncate([size]) | Truncates the file's size. If size is specified, the file is truncated to (at most) that size. |
| close( ) | Close the file. |
file=open("c:/temp/info.txt")
data=file.read()
print(data)
file.close()
P.Choudhari CCIT Rajapeth Amravati 444601
file=open("c:/temp/info.txt")
data=file.read(4)
print(data)
data=file.read(6)
print(data)
file.close()
P.Ch oudhar
file=open("c:/temp/info.txt")
data=file.readline()
print(data)
file.close()
P.Choudhari
file=open("c:/temp/info.txt")
lst=file.readlines()
i=1
for data in lst:
print(i,":",data)
i=i+1
file.close()
1: P.Choudhari 2: CCIT 3: Rajapeth Amravati 4: 444601
file=open("c:/temp/list.txt","w")
data="Amit Jain\nRaja Rathi\nMona
Mnatri"
file.write(data)
file.close()
print("data stored. . .")
data stored...
data=input("Enter Name :")
file=open("c:/temp/list.txt","a")
file.write("\n"+data)
file.close()
print("data stored...")
Enter Name: Radha Rai data stored...
filex=open("c:\\temp\\hanuman.jpg","rb")
data=filex.read()
filex.close()
filey=open("c:\\temp\\backup.jpg","wb")
filey.write(data)
filey.close()
print("file copied")
File copied