Add files via upload

Author: yadavsakshi6061

day4-File_input-output.py

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+"""File I/O python
+python can be used to perform operation on a file (read and write)
+Type of all files
+1. text files: .txt, .docx, .log etc .(stored in char form)
+2. binary files: .mp4, .mov ,.png , .jpeg etc.(0,1)
+
+# 1 & 2 are at the end bytes
+#ROM{random access memory}= fast excution, valatile(data will be deleted) OR files can be used.
+
+#open , read ,close file
+we we have to open the file before read and write
+EX:
+    #function
+f = open("file.name",mode)
+         #sample.txt #r: read mode
+         #demo.docx  #w: write mode
+"""
+#read method
+
+f = open("para.txt","r")
+
+data = f.read() #reads entire file
+data1 = f.read(2) #reads word by word
+data2 = f.readline(2) #reads one line at a time
+
+print(data)
+print(data1)
+print(data2)
+
+
+# write method
+
+f = open("para.txt","w")
+h = open("para.txt","a")
+
+data = f.write("then i will move to html css javascript")
+
+f.close()
+h.close()
+
+#opration
+f = open("para.txt","r+")
+#r+ reading and writing     note pointer at start - no truncate
+#w+  writhing and reading   note - truncate
+#a+  open the file          note pointer placed at end
+
+""""
+#character          meaning
+'r'          open for reading (default)
+'w'          open for writing, truncating the file first
+'x'          create a new file and open it for writing
+'a'          open for writing, appending to the end of the file if it exists
+'b'          binary mode
+'t'          text mode (default)
+'+'          open a disk file for updating (reading and writing)"""
+
+
+#with syntax
+                      #giving diff name
+with open("para.txt","r") as j:
+    data= j.read()
+    print(j)
+
+with open("para.txt","w") as j:
+    j.read("new data")
+
+"""deleting a file method
+using os module 
+module (like  a code library) is a filr written by another programmer that generally has a 
+function we can use ."""
+
+#EX
+import os
+
+#os.remove("para.txt")
+
+
+