Moved case transformation before initialization check

This commit is contained in:
Andrew Murray 2021-02-05 20:28:34 +11:00
parent 0c1675a143
commit 587e073dac

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@ -2922,10 +2922,11 @@ def open(fp, mode="r", formats=None):
def _open_core(fp, filename, prefix, formats): def _open_core(fp, filename, prefix, formats):
for i in formats: for i in formats:
i = i.upper()
if i not in OPEN: if i not in OPEN:
init() init()
try: try:
factory, accept = OPEN[i.upper()] factory, accept = OPEN[i]
result = not accept or accept(prefix) result = not accept or accept(prefix)
if type(result) in [str, bytes]: if type(result) in [str, bytes]:
accept_warnings.append(result) accept_warnings.append(result)