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Add support of row number as a key #16

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Add support of row number as a key #16

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14 changes: 10 additions & 4 deletions csv_diff/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@
import json
import hashlib

ROW_NUMBER = "row"

def load_csv(fp, key=None, dialect=None):
if dialect is None and fp.seekable():
Expand All @@ -17,13 +18,18 @@ def load_csv(fp, key=None, dialect=None):
fp = csv.reader(fp, dialect=(dialect or "excel"))
headings = next(fp)
rows = [dict(zip(headings, line)) for line in fp]
if key:
keyfn = lambda r: r[key]
if key == ROW_NUMBER:
if key in headings:
keyfn = lambda i, r: r[key] # @UnusedVariable
else:
keyfn = lambda i, r: i # @UnusedVariable
elif key:
keyfn = lambda i, r: r[key] # @UnusedVariable
else:
keyfn = lambda r: hashlib.sha1(
keyfn = lambda i, r: hashlib.sha1( # @UnusedVariable
json.dumps(r, sort_keys=True).encode("utf8")
).hexdigest()
return {keyfn(r): r for r in rows}
return {keyfn(i, r): r for i, r in enumerate(rows)}


def load_json(fp, key=None):
Expand Down