def test_fwf_file_chunksize():
setup_fwf_file(overwrite=True)
# Tests __next__ and correctness of reader as an iterator
rdf_reader = pd.read_fwf(TEST_FWF_FILENAME, chunksize=5)
pd_reader = pandas.read_fwf(TEST_FWF_FILENAME, chunksize=5)
for modin_df, pd_df in zip(rdf_reader, pd_reader):
df_equals(modin_df, pd_df)
# Tests that get_chunk works correctly
rdf_reader = pd.read_fwf(TEST_FWF_FILENAME, chunksize=1)
pd_reader = pandas.read_fwf(TEST_FWF_FILENAME, chunksize=1)
modin_df = rdf_reader.get_chunk(1)
pd_df = pd_reader.get_chunk(1)
df_equals(modin_df, pd_df)
# Tests that read works correctly
rdf_reader = pd.read_fwf(TEST_FWF_FILENAME, chunksize=1)
pd_reader = pandas.read_fwf(TEST_FWF_FILENAME, chunksize=1)
modin_df = rdf_reader.read()
pd_df = pd_reader.read()
df_equals(modin_df, pd_df)
def test_fwf_file_parse_dates():
dates = pandas.date_range("2000", freq="h", periods=10)
fwf_data = "col1 col2 col3 col4"
for i in range(10, 20):
fwf_data = fwf_data + "\n{col1} {col2} {col3} {col4}".format(
col1=str(i),
col2=str(dates[i - 10].date()),
col3=str(i),
col4=str(dates[i - 10].time()),
)
setup_fwf_file(overwrite=True, fwf_data=fwf_data)
pandas_df = pandas.read_fwf(TEST_FWF_FILENAME,
parse_dates=[["col2", "col4"]])
modin_df = pd.read_fwf(TEST_FWF_FILENAME, parse_dates=[["col2", "col4"]])
df_equals(modin_df, pandas_df)
pandas_df = pandas.read_fwf(TEST_FWF_FILENAME,
parse_dates={"time": ["col2", "col4"]})
modin_df = pd.read_fwf(TEST_FWF_FILENAME,
parse_dates={"time": ["col2", "col4"]})
df_equals(modin_df, pandas_df)
teardown_fwf_file()
def test_fwf_file_colspecs_widths(kwargs):
setup_fwf_file(overwrite=True)
modin_df = pd.read_fwf(TEST_FWF_FILENAME, **kwargs)
pandas_df = pd.read_fwf(TEST_FWF_FILENAME, **kwargs)
df_equals(modin_df, pandas_df)
def test_fwf_file_skiprows():
setup_fwf_file(overwrite=True)
pandas_df = pandas.read_fwf(TEST_FWF_FILENAME, skiprows=2)
modin_df = pd.read_fwf(TEST_FWF_FILENAME, skiprows=2)
df_equals(modin_df, pandas_df)
pandas_df = pandas.read_fwf(TEST_FWF_FILENAME, usecols=[0, 4, 7], skiprows=[2, 5])
modin_df = pd.read_fwf(TEST_FWF_FILENAME, usecols=[0, 4, 7], skiprows=[2, 5])
df_equals(modin_df, pandas_df)
def test_fwf_file_skipfooter():
setup_fwf_file(overwrite=True)
pandas_df = pandas.read_fwf(TEST_FWF_FILENAME, skipfooter=2)
modin_df = pd.read_fwf(TEST_FWF_FILENAME, skipfooter=2)
df_equals(modin_df, pandas_df)
def test_fwf_file():
setup_fwf_file()
colspecs = [(0, 6), (8, 20), (21, 33), (34, 43)]
with pytest.warns(UserWarning):
df = pd.read_fwf(TEST_FWF_FILENAME, colspecs=colspecs, header=None, index_col=0)
assert isinstance(df, pd.DataFrame)
teardown_fwf_file()
def test_fwf_file():
fwf_data = """id8141 360.242940 149.910199 11950.7
id1594 444.953632 166.985655 11788.4
id1849 364.136849 183.628767 11806.2
id1230 413.836124 184.375703 11916.8
id1948 502.953953 173.237159 12468.3"""
setup_fwf_file(True, fwf_data=fwf_data)
colspecs = [(0, 6), (8, 20), (21, 33), (34, 43)]
df = pd.read_fwf(TEST_FWF_FILENAME, colspecs=colspecs, header=None, index_col=0)
assert isinstance(df, pd.DataFrame)
teardown_fwf_file()
def test_fwf_file_index_col():
fwf_data = """a b c d
id8141 360.242940 149.910199 11950.7
id1594 444.953632 166.985655 11788.4
id1849 364.136849 183.628767 11806.2
id1230 413.836124 184.375703 11916.8
id1948 502.953953 173.237159 12468.3"""
setup_fwf_file(overwrite=True, fwf_data=fwf_data)
pandas_df = pandas.read_fwf(TEST_FWF_FILENAME, index_col="c")
modin_df = pd.read_fwf(TEST_FWF_FILENAME, index_col="c")
df_equals(modin_df, pandas_df)
teardown_fwf_file()
def test_fwf_file_kwargs():
fwf_data = """ACW000116041961TAVG -142 k 183 k 419 k 720 k 1075 k 1546 k 1517 k 1428 k 1360 k 1121 k 457 k -92 k
ACW000116041962TAVG 60 k 32 k -207 k 582 k 855 k 1328 k 1457 k 1340 k 1110 k 941 k 270 k -179 k
ACW000116041963TAVG -766 k -606 k -152 k 488 k 1171 k 1574 k 1567 k 1543 k 1279 k 887 k 513 k -161 k
ACW000116041964TAVG 9 k -138 k 2 k 685 k 1166 k 1389 k 1453 k 1504 k 1168 k 735 k 493 k 59 k
ACW000116041965TAVG -9 k -158 k -15 k 537 k 934 k 1447 k 1434 k 1424 k 1324 k 921 k -22 k -231 k
ACW000116041966TAVG -490 k -614 k 108 k 246 k 1082 k 1642 k 1620 k 1471 k 1195 k 803 k 329 k 2 k
ACW000116041967TAVG -270 k 36 k 397 k 481 k 1052 k 1373 k 1655 k 1598 k 1318 k 997 k 559 k -96 k
ACW000116041968TAVG -306 k -183 k 220 k 714 k 935 k 1635 k 1572 k 1718 k 1331 k 781 k 180 k -56 k
ACW000116041969TAVG -134 k -494 k -185 k 497 k 962 k 1634 k 1687 k 1773 k 1379 k 932 k 321 k -275 k
ACW000116041970TAVG -483 k -704 k -75 k 261 k 1093 k 1724 k 1470 k 1609 k 1163 k 836 k 300 k 73 k
ACW000116041971TAVG -6 k 83 k -40 k 472 k 1180 k 1411 k 1700 k 1600 k 1165 k 908 k 361 k 383 k
ACW000116041972TAVG -377 k -4 k 250 k 556 k 1117 k 1444 k 1778 k 1545 k 1073 k 797 k 481 k 404 k
ACW000116041973TAVG 61 k 169 k 453 k 472 k 1075 k 1545 k 1866 k 1579 k 1199 k 563 k 154 k 11 k
ACW000116041974TAVG 191 k 209 k 339 k 748 k 1094 k 1463 k 1498 k 1541 k 1319 k 585 k 428 k 335 k
ACW000116041975TAVG 346 k 88 k 198 k 488 k 1165 k 1483 k 1756 k 1906 k 1374 k 845 k 406 k 387 k
ACW000116041976TAVG -163 k -62 k -135 k 502 k 1128 k 1461 k 1822 k 1759 k 1136 k 715 k 458 k -205 k
ACW000116041977TAVG -192 k -279 k 234 k 332 k 1128 k 1566 k 1565 k 1556 k 1126 k 949 k 421 k 162 k
ACW000116041978TAVG 55 k -354 k 66 k 493 k 1155 k 1552 k 1564 k 1555 k 1061 k 932 k 688 k -464 k
ACW000116041979TAVG -618 k -632 k 35 k 474 k 993 k 1566 k 1484 k 1483 k 1229 k 647 k 412 k -40 k
ACW000116041980TAVG -340 k -500 k -35 k 524 k 1071 k 1534 k 1655 k 1502 k 1269 k 660 k 138 k 125 k"""
with open(TEST_FWF_FILENAME, "w") as f:
f.write(fwf_data)
column_specs = [
(0, 11),
(11, 15),
(19, 24),
(27, 32),
(35, 40),
(43, 48),
(51, 56),
(59, 64),
(67, 72),
(75, 80),
(83, 88),
(91, 96),
(99, 104),
(107, 112),
]
column_names = ["stationID", "year", 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
nan_values = ["-9999"]
with pytest.warns(UserWarning):
modin_df = pd.read_fwf(
TEST_FWF_FILENAME,
colspecs=column_specs,
names=column_names,
na_values=nan_values,
index_col=["stationID", "year"],
)
pandas_df = pd.read_fwf(
TEST_FWF_FILENAME,
colspecs=column_specs,
names=column_names,
na_values=nan_values,
index_col=["stationID", "year"],
)
df_equals(modin_df, pandas_df)
teardown_fwf_file()
