Tool for importing existing Python projects, i.e. generating .pyproject files

import os

#Which file types to add to the project file
file_types = (".py", ".xml", ".dtd", ".sh")

#Open a project file and write the needed start of the project file syntax
projectFileName = "MyProject.pyproject"
f = open(projectFileName, "w")
f.write("{\n\t\"files\": [")

#Walk recursively through the folder structure and write all files
#with the given file types into the project file.
nFiles = 0
for dirpath, dirnames, files in os.walk('.'):
    for file_name in files:
        if (file_name.endswith(file_types)):
            if (len(dirpath) == 1):
                f.write("\"" + file_name + "\",") #Root folder
            else:
                f.write("\"" + dirpath[2:] + "/" + file_name + "\",") #Need relative path down in the folder tree
            nFiles += 1

#Remove trailing comma after the last file name
f.seek(-1, os.SEEK_END)
f.truncate()

#Write ending syntax and close the project file
f.write("]\n}")
f.close()

print "Created and added " + str(nFiles) + " files to the project file: " + projectFileName + "."