TypeError: Type str doesn't support the buffer API for string

Question

rootPath = arg
pattern = '*.*'
f = open('facad.csv', 'w')
fname = 'facad.csv'


for root, dirs, files in os.walk(rootPath):
    for filename in fnmatch.filter(files, pattern):
        if 'SETQ' and 'findfile' and 'getvar' in open(os.path.join(root, filename), 'rb').read():
            data = os.path.join(root, filename)+", ACAD_LSP\n"
            f.write(data)
        elif 'base.dcl' in open(os.path.join(root, filename)).read():
            data = os.path.join(root, filename)+", ACAD_LSP\n"
            f.write(data)
        elif 'vl-file-copy' in open(os.path.join(root, filename)).read():
            data= os.path.join(root, filename)+", ACAD_LSP\n"
            f.write(data)
        elif 'FAS4-FILE' in open(os.path.join(root, filename)).read():
            data = os.path.join(root, filename)+", ACAD_FAS\n"
            f.write(data)
        elif 'Autodesk' in open(os.path.join(root, filename)).read():
             data = os.path.join(root, filename)+", ACAD_LSP\n"
             f.write(data)
        elif 'acad.lsp' in open(os.path.join(root, filename)).read():
             data = os.path.join(root, filename)+", ACAD_LSP\n"
             f.write(data)
f.close()

I am getting this error:

C:\Python33>python D:\python\ftacad.py G:\ginipig\acad_and_lisp\ACAD_samples 
Traceback (most recent call last): 
File "D:\python\ftacad.py", line 62, in <module>
  main() 
File "D:\python\ftacad.py", line 40, in main
  if 'SETQ' and 'findfile' and 'getvar' in open(os.path.join(root, filename),' rb').read(): 
TypeError: Type str doesn't support the buffer API

I have various types of files to search. Code not running only in 3.x. Runs fine below this version of Python.

You need to give us the full traceback of your exception; it means you need to pass in bytes, not a unicode string. — Martijn Pieters
– Martijn Pieters, Commented Oct 14, 2014 at 7:31
Also, you have a problem with your first if condition; your code is not working as designed even in Python 2. See How do I test one variable against multiple values? — Martijn Pieters
– Martijn Pieters, Commented Oct 14, 2014 at 7:32
You are also reading the each file six times, making your code exceedingly slow. Read the file just once. — Martijn Pieters
– Martijn Pieters, Commented Oct 14, 2014 at 7:33
can someone give me write use of first if statement where i checked 3 conditions — Rajendra
– Rajendra, Commented Oct 14, 2014 at 8:31

hynekcer · Accepted Answer · 2014-10-14 08:49:39Z

Code for Python 2.6, 2.7, 3.x

rootPath = arg
pattern = '*.*'
f = open('facad.csv', 'w')
fname = 'facad.csv'


for root, dirs, files in os.walk(rootPath):
    for filename in fnmatch.filter(files, pattern):
        fullname = os.path.join(root, filename)
        with open(fullname, 'rb') as infile:
            data = infile.read()
        output = None

        if b'SETQ' in data and b'findfile' in data and b'getvar' in data:
            output = "ACAD_LSP"
        elif b'base.dcl' in data:
            output = 'ACAD_LSP'
        elif b'vl-file-copy' in data:
            output = 'ACAD_LSP'
        elif b'FAS4-FILE' in data:
            output = 'ACAD_FAS'
        elif b'Autodesk' in data:
            output = 'ACAD_LSP'
        elif b'acad.lsp' in data:
            output = 'ACAD_LSP'

        if output:
            f.write("{0}, {1}\n".format(fullname, output).encode(utf-8'))
f.close()

A shorter clear code is better. DRY principle: Don't repeat yourself.

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