Python File Handling52616416416 ppt.pptx

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1. File Handling In Python Name:- Sahil Thakur Roll no:- CI230200089S

2. File Handling In Python Python supports file handling and allows users to handle files i.e., to read and write files, along with many other file handling options, to operate on files.

3. PYTHON FILE OPEN Before performing any operation on the file like reading or writing, first, we have to open that file. For this, we should use Python’s inbuilt function open() but at the time of opening, we have to specify the mode, which represents the purpose of the opening file f = open(filename, mode)

4. METHOD FOR OPEN A FILE r: open an existing file for a read operation. Syntax-> F = Open(‘demo.txt’,’r’) print( File.read ()) w: open an existing file for a write operation. If the file already contains some data, then it will be overridden but if the file is not present then it creates the file as well. Syntax-> File = Open(‘demo.txt’ ‘w’) File. Write(‘ hello,world ’) a: open an existing file for append operation. It won’t override existing data. Syntax-> File.write(‘Appending.txt’)

5. r+: To read and write data into the file. This mode does not override the existing data, but you can modify the data starting from the beginning of the file . w+: To write and read data. It overwrites the previous file if one exists, it will truncate the file to zero length or create a file if it does not exist. X: Create – Create the specified file, return an error if file exist file = open(‘demo.txt’,’x’)

6. Opening Files in Python f = open(“raw.txt") # equivalent to 'r' or ' rt ' f = open(“ raw.txt",'w ') # write in text mode f = open("img. png ",' r+b ') # read and write in binary mode f= open(“ raw.txt","w +") #read and write permissions

7. Working in Write Mode In this example, we will see how the write mode and the write() function is used to write in a file. The close() command terminates all the resources in use and frees the system of this particular program. # Python code to create a file file = open(' geek.txt','w ') file.write ("This is the write command") file.write ("It allows us to write in a particular file") file.close ()

8. Thank You