TSV importer that supports headers

[golobor]

$ cooler -pm load -f bg2 --count-as-float --tril-action drop ./data/test.10.bins ./data/sin_eigs_mat.bg2 ./data/sin_eigs_mat.cool
Traceback (most recent call last):
  File "/home/golobor/miniconda3/lib/python3.6/site-packages/pandas/core/ops.py", line 676, in na_op
    result = expressions.evaluate(op, str_rep, x, y, **eval_kwargs)
  File "/home/golobor/miniconda3/lib/python3.6/site-packages/pandas/core/computation/expressions.py", line 204, in evaluate
    return _evaluate(op, op_str, a, b, **eval_kwargs)
  File "/home/golobor/miniconda3/lib/python3.6/site-packages/pandas/core/computation/expressions.py", line 119, in _evaluate_numexpr
    result = _evaluate_standard(op, op_str, a, b)
  File "/home/golobor/miniconda3/lib/python3.6/site-packages/pandas/core/computation/expressions.py", line 64, in _evaluate_standard
    return op(a, b)
TypeError: unsupported operand type(s) for -: 'str' and 'str'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/golobor/miniconda3/lib/python3.6/site-packages/pandas/core/ops.py", line 700, in safe_na_op
    return na_op(lvalues, rvalues)
  File "/home/golobor/miniconda3/lib/python3.6/site-packages/pandas/core/ops.py", line 682, in na_op
    result[mask] = op(x[mask], _values_from_object(y[mask]))
TypeError: unsupported operand type(s) for -: 'str' and 'str'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/golobor/miniconda3/bin/cooler", line 6, in <module>
    sys.exit(cooler.cli.cli())
  File "/home/golobor/miniconda3/lib/python3.6/site-packages/click/core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "/home/golobor/miniconda3/lib/python3.6/site-packages/click/core.py", line 697, in main
    rv = self.invoke(ctx)
  File "/home/golobor/miniconda3/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/home/golobor/miniconda3/lib/python3.6/site-packages/click/core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/home/golobor/miniconda3/lib/python3.6/site-packages/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/home/golobor/miniconda3/lib/python3.6/site-packages/cooler/cli/load.py", line 244, in load
    sort=True)
  File "/home/golobor/miniconda3/lib/python3.6/site-packages/cooler/_binning.py", line 1310, in sanitize_records
    options['gs'] = GenomeSegmentation(chromsizes, bins)
  File "/home/golobor/miniconda3/lib/python3.6/site-packages/cooler/_binning.py", line 107, in __init__
    self.binsize = get_binsize(bins)
  File "/home/golobor/miniconda3/lib/python3.6/site-packages/cooler/util.py", line 325, in get_binsize
    sizes.update((group['end'] - group['start']).iloc[:-1].unique())
  File "/home/golobor/miniconda3/lib/python3.6/site-packages/pandas/core/ops.py", line 739, in wrapper
    result = wrap_results(safe_na_op(lvalues, rvalues))
  File "/home/golobor/miniconda3/lib/python3.6/site-packages/pandas/core/ops.py", line 710, in safe_na_op
    lambda x: op(x, rvalues))
  File "pandas/_libs/algos_common_helper.pxi", line 1212, in pandas._libs.algos.arrmap_object
  File "/home/golobor/miniconda3/lib/python3.6/site-packages/pandas/core/ops.py", line 710, in <lambda>
    lambda x: op(x, rvalues))
TypeError: unsupported operand type(s) for -: 'str' and 'str'

> /home/golobor/miniconda3/lib/python3.6/site-packages/pandas/core/ops.py(710)<lambda>()
    709                     return libalgos.arrmap_object(lvalues,
--> 710                                                   lambda x: op(x, rvalues))
    711             raise

ipdb> u
> /home/golobor/programming/cooltools/tests/pandas/_libs/algos_common_helper.pxi(1212)pandas._libs.algos.arrmap_object()

ipdb> u
> /home/golobor/miniconda3/lib/python3.6/site-packages/pandas/core/ops.py(710)safe_na_op()
    709                     return libalgos.arrmap_object(lvalues,
--> 710                                                   lambda x: op(x, rvalues))
    711             raise

ipdb> u
> /home/golobor/miniconda3/lib/python3.6/site-packages/pandas/core/ops.py(739)wrapper()
    738 
--> 739         result = wrap_results(safe_na_op(lvalues, rvalues))
    740         return construct_result(

ipdb> u
> /home/golobor/miniconda3/lib/python3.6/site-packages/cooler/util.py(325)get_binsize()
    324     for chrom, group in bins.groupby('chrom'):
--> 325         sizes.update((group['end'] - group['start']).iloc[:-1].unique())
    326         if len(sizes) > 1:

ipdb> u
> /home/golobor/miniconda3/lib/python3.6/site-packages/cooler/_binning.py(107)__init__()
    106         self.chromsizes = chromsizes
--> 107         self.binsize = get_binsize(bins)
    108         self.contigs = list(chromsizes.keys())

ipdb> u
> /home/golobor/miniconda3/lib/python3.6/site-packages/cooler/_binning.py(1310)sanitize_records()
   1309     chromsizes = get_chromsizes(bins)
-> 1310     options['gs'] = GenomeSegmentation(chromsizes, bins)
   1311     return partial(_sanitize_records, **options)

ipdb> u
> /home/golobor/miniconda3/lib/python3.6/site-packages/cooler/cli/load.py(244)load()
    243             tril_action=tril_action,
--> 244             sort=True)
    245 

ipdb> u
> /home/golobor/miniconda3/lib/python3.6/site-packages/click/core.py(535)invoke()
    534             with ctx:
--> 535                 return callback(*args, **kwargs)
    536 

[nvictus]

The input file had a header, which isn't supported. We need a smarter tsv importer.

[nvictus]

Migrating to #209