# Error with Table.from\_pandas **URL:** \ **Category:** Hail Query & hailctl\ **Created:** [February 21, 2022, 4:48pm UTC](https://discuss.hail.is/t/error-with-table-from-pandas/2516 "2022-02-21T16:48:12Z")\ **Posts on this page:** 1\ **Page:** 2
**Author:** ![Ofer](https://avatars.discourse-cdn.com/v4/letter/o/a4c791/32.png) [@Ofer](https://discuss.hail.is/u/Ofer)\ **Post date:** [September 22, 2022, 9:39am UTC](https://discuss.hail.is/t/error-with-table-from-pandas/2516/21 "2022-09-22T09:39:15Z")
Hi, I’m getting this error and I’m using Hail version 0.2.95-513139587f57. Code: `i = hl.Table.from_pandas(cm_in_genes)` Error: ```python --------------------------------------------------------------------------- ExpressionException Traceback (most recent call last) /cs/labs/michall/ofer.feinstein/my_env/lib/python3.7/site-packages/hail/expr/expressions/base_expression.py in raise_for_holes(t) 239 try: --> 240 raise_for_holes(vt) 241 except ExpressionException as exc: /cs/labs/michall/ofer.feinstein/my_env/lib/python3.7/site-packages/hail/expr/expressions/base_expression.py in raise_for_holes(t) 231 if t is None: --> 232 raise ExpressionException("Hail cannot impute type") 233 if t in (tbool, tint32, tint64, tfloat32, tfloat64, tstr, tcall): ExpressionException: Hail cannot impute type The above exception was the direct cause of the following exception: ExpressionException Traceback (most recent call last) /cs/labs/michall/ofer.feinstein/my_env/lib/python3.7/site-packages/hail/expr/expressions/base_expression.py in raise_for_holes(t) 252 try: --> 253 raise_for_holes(t.element_type) 254 except ExpressionException as exc: /cs/labs/michall/ofer.feinstein/my_env/lib/python3.7/site-packages/hail/expr/expressions/base_expression.py in raise_for_holes(t) 241 except ExpressionException as exc: --> 242 raise ExpressionException(f'cannot impute field {k}') from exc 243 return ExpressionException: cannot impute field chrom The above exception was the direct cause of the following exception: ExpressionException Traceback (most recent call last) /tmp/ipykernel_13276/3652694852.py in ----> 1 i = hl.Table.from_pandas(cm_in_genes) 2 # i = i.key_by(interval = hl.locus_interval( 3 # hl.literal('chr') + hl.str(i.chrom), 4 # i.CM_start, 5 # i.CM_end in from_pandas(df, key) /cs/labs/michall/ofer.feinstein/my_env/lib/python3.7/site-packages/hail/typecheck/check.py in wrapper(__original_func, *args, **kwargs) 575 def wrapper(__original_func, *args, **kwargs): 576 args_, kwargs_ = check_all(__original_func, args, kwargs, checkers, is_method=is_method) --> 577 return __original_func(*args_, **kwargs_) 578 579 return wrapper /cs/labs/michall/ofer.feinstein/my_env/lib/python3.7/site-packages/hail/table.py in from_pandas(df, key) 3406 hl_type_hints[field] = type_hint 3407 -> 3408 new_table = hl.Table.parallelize(data, partial_type=hl_type_hints) 3409 return new_table if not key else new_table.key_by(*key) 3410 in parallelize(cls, rows, schema, key, n_partitions, partial_type) /cs/labs/michall/ofer.feinstein/my_env/lib/python3.7/site-packages/hail/typecheck/check.py in wrapper(__original_func, *args, **kwargs) 575 def wrapper(__original_func, *args, **kwargs): 576 args_, kwargs_ = check_all(__original_func, args, kwargs, checkers, is_method=is_method) --> 577 return __original_func(*args_, **kwargs_) 578 579 return wrapper /cs/labs/michall/ofer.feinstein/my_env/lib/python3.7/site-packages/hail/table.py in parallelize(cls, rows, schema, key, n_partitions, partial_type) 534 if partial_type is not None: 535 partial_type = hl.tarray(hl.tstruct(**partial_type)) --> 536 rows = to_expr(rows, dtype=dtype, partial_type=partial_type) 537 if not isinstance(rows.dtype.element_type, tstruct): 538 raise TypeError("'parallelize' expects an array with element type 'struct', found '{}'" /cs/labs/michall/ofer.feinstein/my_env/lib/python3.7/site-packages/hail/expr/expressions/base_expression.py in to_expr(e, dtype, partial_type) 273 raise TypeError("expected expression of type '{}', found expression of type '{}'".format(dtype, e.dtype)) 274 return e --> 275 return cast_expr(e, dtype, partial_type) 276 277 /cs/labs/michall/ofer.feinstein/my_env/lib/python3.7/site-packages/hail/expr/expressions/base_expression.py in cast_expr(e, dtype, partial_type) 279 assert dtype is None or partial_type is None 280 if not dtype: --> 281 dtype = impute_type(e, partial_type) 282 x = _to_expr(e, dtype) 283 if isinstance(x, Expression): /cs/labs/michall/ofer.feinstein/my_env/lib/python3.7/site-packages/hail/expr/expressions/base_expression.py in impute_type(x, partial_type) 128 def impute_type(x, partial_type=None): 129 t = _impute_type(x, partial_type=partial_type) --> 130 raise_for_holes(t) 131 return t 132 /cs/labs/michall/ofer.feinstein/my_env/lib/python3.7/site-packages/hail/expr/expressions/base_expression.py in raise_for_holes(t) 253 raise_for_holes(t.element_type) 254 except ExpressionException as exc: --> 255 raise ExpressionException('cannot impute array elements') from exc 256 return 257 if isinstance(t, tdict): ExpressionException: cannot impute array elements ``` Thanks 🙂 [Previous page](https://discuss.hail.is/t/error-with-table-from-pandas/2516.md?page=1)