Python-search-replace.py

file = input("Input your file name coreectly : ")
#Input your file name with extention, example : file.txt
#It will work when you use it on same directory of your file
bef = input("What text you want to replace? ")
aft = input("Input your new text : ")

fin = open(file, "rt")
data = fin.read()
data = data.replace(bef,aft)
fin.close()

fin = open(file, "wt")
fin.write(data)
fin.close()