One obvious problem is that you are using a regular string, not a raw string. IN
open ("C:\Users\Rajrishi\Documents\MyJava\text.txt") ^^
\t interpreted as a tab character, not a literal backslash, and then t .
Use one of the following actions:
open("C:\\Users\\Rajrishi\\Documents\\MyJava\\text.txt") # meh open(r"C:\Users\Rajrishi\Documents\MyJava\text.txt") # better open("C:/Users/Rajrishi/Documents/MyJava/text.txt") # also possible
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