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textmagicscripts/sanitize

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+#!/usr/bin/python3
+"""
+This is a very-very simple filename sanitizer program written in python
+"""
+
+import sys                  # argv
+import os                   # rename
+import unicodedata as unid  # normalize
+sys.tracebacklimit = 0
+
+def test_special_char(my_char):
+    """
+    Test if a character is special in terms of filename
+    """
+    char_num = ord(my_char)
+    if char_num > 127:   # case ß
+        return False
+
+    return (
+        my_char.isalnum() or
+        char_num == 95 or
+        char_num == 47 or
+        char_num == 46 or
+        char_num == 45
+    ) and (char_num < 127)
+
+
+def sanitize(filename):
+    """
+    A simple filename sanitizer
+    """
+    spaceless_unicode = ["_" if i == " " else i for i in filename]
+    spaceless_unicode = unid.normalize("NFKD", "".join(spaceless_unicode))
+    ret = [i if test_special_char(i) else "" for i in spaceless_unicode]
+    return "".join(ret)
+
+
+if __name__ == "__main__":
+    for row in sys.stdin:
+        print(sanitize(row))