Simplify conditional branch in _read function in readers.py (#45696)

Author: Compro-Prasad

pandas/io/parsers/readers.py

@@ -542,13 +542,11 @@ def _read(
  """Generic reader of line files."""
  # if we pass a date_parser and parse_dates=False, we should not parse the
  # dates GH#44366
- if (
- kwds.get("date_parser", None) is not None
- and kwds.get("parse_dates", None) is None
- ):
- kwds["parse_dates"] = True
- elif kwds.get("parse_dates", None) is None:
- kwds["parse_dates"] = False
+ if kwds.get("parse_dates", None) is None:
+ if kwds.get("date_parser", None) is None:
+ kwds["parse_dates"] = False
+ else:
+ kwds["parse_dates"] = True
 
  # Extract some of the arguments (pass chunksize on).
  iterator = kwds.get("iterator", False)
@@ -564,7 +562,7 @@ def _read(
  "The 'chunksize' option is not supported with the 'pyarrow' engine"
  )
  else:
- chunksize = validate_integer("chunksize", kwds.get("chunksize", None), 1)
+ chunksize = validate_integer("chunksize", chunksize, 1)
 
  nrows = kwds.get("nrows", None)