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Fix IndexError with maxheadercolwidths on empty tables #393

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Fix IndexError with maxheadercolwidths on empty tables #393

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28 changes: 17 additions & 11 deletions tabulate/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2262,18 +2262,24 @@ def tabulate(
)

if maxheadercolwidths is not None:
num_cols = len(list_of_lists[0])
if isinstance(maxheadercolwidths, int): # Expand scalar for all columns
maxheadercolwidths = _expand_iterable(
maxheadercolwidths, num_cols, maxheadercolwidths
)
else: # Ignore col width for any 'trailing' columns
maxheadercolwidths = _expand_iterable(maxheadercolwidths, num_cols, None)
if len(list_of_lists):
num_cols = len(list_of_lists[0])
elif len(headers):
num_cols = len(headers)
else:
num_cols = 0
if num_cols:
if isinstance(maxheadercolwidths, int): # Expand scalar for all columns
maxheadercolwidths = _expand_iterable(
maxheadercolwidths, num_cols, maxheadercolwidths
)
else: # Ignore col width for any 'trailing' columns
maxheadercolwidths = _expand_iterable(maxheadercolwidths, num_cols, None)

numparses = _expand_numparse(disable_numparse, num_cols)
headers = _wrap_text_to_colwidths(
[headers], maxheadercolwidths, numparses=numparses, break_long_words=break_long_words, break_on_hyphens=break_on_hyphens
)[0]
numparses = _expand_numparse(disable_numparse, num_cols)
headers = _wrap_text_to_colwidths(
[headers], maxheadercolwidths, numparses=numparses, break_long_words=break_long_words, break_on_hyphens=break_on_hyphens
)[0]

# empty values in the first column of RST tables should be escaped (issue #82)
# "" should be escaped as "\\ " or ".."
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