Simplify with .writable() method.

Addresses https://github.com/jensengroup/propka-3.1/pull/50#discussion_r434349737
2020-06-03 17:49:19 -07:00
parent 1d17cb05ed
commit 7085271ad5
1 changed files with 1 additions and 2 deletions
--- a/propka/output.py
+++ b/propka/output.py
@@ -13,8 +13,7 @@ def open_file_for_writing(input_file):
        then will attempt to get file mode.
    """
    try:
-        mode = input_file.mode
-        if not ("w" in mode or "a" in mode or "+" in mode):
+        if not input_file.writable():
            raise IOError("File/stream not open for writing")
        return input_file
    except AttributeError: