def test_pandas_writes_header_by_default():
with tmpfile('.csv') as fn:
ds = datashape.dshape('var * {name: string, amount: int}')
data = [('Alice', 1), ('Bob', 2)]
csv = CSV(fn)
append(csv, data, dshape=ds)
with open(fn) as f:
assert 'name' in f.read()
def test_pandas_writes_header_by_default():
with tmpfile('.csv') as fn:
ds = datashape.dshape('var * {name: string, amount: int}')
data = [('Alice', 1), ('Bob', 2)]
csv = CSV(fn)
append(csv, data, dshape=ds)
with open(fn) as f:
assert 'name' in f.read()
def test_pandas_write_gzip():
with tmpfile('.csv.gz') as fn:
ds = datashape.dshape('var * {name: string, amount: int}')
data = [('Alice', 1), ('Bob', 2)]
csv = CSV(fn, has_header=True)
append(csv, data, dshape=ds)
f = gzip.open(fn)
s = f.read()
assert 'name' in s
assert 'Alice,1' in s
f.close()
def test_pandas_write_gzip():
with tmpfile('.csv.gz') as fn:
ds = datashape.dshape('var * {name: string, amount: int}')
data = [('Alice', 1), ('Bob', 2)]
csv = CSV(fn, has_header=True)
append(csv, data, dshape=ds)
f = gzip.open(fn)
s = f.read()
assert 'name' in s
assert 'Alice,1' in s
f.close()
def test_csv_append():
with tmpfile('.csv') as fn:
csv = CSV(fn, has_header=False)
data = [('Alice', 100), ('Bob', 200)]
append(csv, data)
assert list(convert(Iterator, csv)) == data
with open(fn) as f:
s = f.read()
assert 'Alice' in s
assert '100' in s
def test_csv_append():
with tmpfile('.csv') as fn:
csv = CSV(fn, has_header=False)
data = [('Alice', 100), ('Bob', 200)]
append(csv, data)
assert list(convert(Iterator, csv)) == data
with open(fn) as f:
s = f.read()
assert 'Alice' in s
assert '100' in s
def test_pandas_write():
with tmpfile('.csv') as fn:
ds = datashape.dshape('var * {name: string, amount: int}')
data = [('Alice', 1), ('Bob', 2)]
csv = CSV(fn, has_header=True)
append(csv, data, dshape=ds)
with open(fn) as f:
assert 'name' in f.read()
# Doesn't write header twice
append(csv, data, dshape=ds)
with open(fn) as f:
s = f.read()
assert s.count('name') == 1
def test_pandas_write():
with tmpfile('.csv') as fn:
ds = datashape.dshape('var * {name: string, amount: int}')
data = [('Alice', 1), ('Bob', 2)]
csv = CSV(fn, has_header=True)
append(csv, data, dshape=ds)
with open(fn) as f:
assert 'name' in f.read()
# Doesn't write header twice
append(csv, data, dshape=ds)
with open(fn) as f:
s = f.read()
assert s.count('name') == 1