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CLN: str.format -> f-strings for io/sas #30409

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Merged
merged 4 commits into from
Dec 24, 2019
Merged

CLN: str.format -> f-strings for io/sas #30409

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b95d3e5
CLN: str.format -> f-strings for `io/sas`
jyscao Dec 22, 2019
cdbd94f
Apply black style
jyscao Dec 22, 2019
0916a04
Fix syntax error
jyscao Dec 23, 2019
0730a0c
Remove `str()` call
jyscao Dec 23, 2019
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27 changes: 13 additions & 14 deletions pandas/io/sas/sas7bdat.py
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Original file line number Diff line number Diff line change
Expand Up @@ -169,7 +169,7 @@ def _get_properties(self):
if buf in const.encoding_names:
self.file_encoding = const.encoding_names[buf]
else:
self.file_encoding = "unknown (code={name!s})".format(name=buf)
self.file_encoding = f"unknown (code={buf})"

# Get platform information
buf = self._read_bytes(const.platform_offset, const.platform_length)
Expand Down Expand Up @@ -293,8 +293,8 @@ def _read_bytes(self, offset, length):
buf = self._path_or_buf.read(length)
if len(buf) < length:
self.close()
msg = "Unable to read {:d} bytes from file position {:d}."
raise ValueError(msg.format(length, offset))
msg = f"Unable to read {length:d} bytes from file position {offset:d}."
raise ValueError(msg)
return buf
else:
if offset + length > len(self._cached_page):
Expand Down Expand Up @@ -457,12 +457,9 @@ def _process_columnsize_subheader(self, offset, length):
self.column_count = self._read_int(offset, int_len)
if self.col_count_p1 + self.col_count_p2 != self.column_count:
print(
"Warning: column count mismatch ({p1} + {p2} != "
"{column_count})\n".format(
p1=self.col_count_p1,
p2=self.col_count_p2,
column_count=self.column_count,
)
f"Warning: column count mismatch ({self.col_count_p1} + "
f"{self.col_count_p2} != "
f"{self.column_count})\n"
)
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for follow-up, this probably should use warnings rather than print


# Unknown purpose
Expand Down Expand Up @@ -672,8 +669,12 @@ def _read_next_page(self):
return True
elif len(self._cached_page) != self._page_length:
self.close()
msg = "failed to read complete page from file (read {:d} of {:d} bytes)"
raise ValueError(msg.format(len(self._cached_page), self._page_length))
msg = (
"failed to read complete page from file (read "
f"{len(self._cached_page):d} of "
f"{self._page_length:d} bytes)"
)
raise ValueError(msg)

self._read_page_header()
page_type = self._current_page_type
Expand Down Expand Up @@ -725,8 +726,6 @@ def _chunk_to_dataframe(self):
js += 1
else:
self.close()
raise ValueError(
"unknown column type {type}".format(type=self._column_types[j])
)
raise ValueError(f"unknown column type {self._column_types[j]}")

return rslt
4 changes: 2 additions & 2 deletions pandas/io/sas/sas_xport.py
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Original file line number Diff line number Diff line change
Expand Up @@ -367,8 +367,8 @@ def _read_header(self):
fl = field["field_length"]
if field["ntype"] == "numeric" and ((fl < 2) or (fl > 8)):
self.close()
msg = "Floating field width {0} is not between 2 and 8."
raise TypeError(msg.format(fl))
msg = f"Floating field width {fl} is not between 2 and 8."
raise TypeError(msg)

for k, v in field.items():
try:
Expand Down
18 changes: 8 additions & 10 deletions pandas/tests/io/sas/test_sas7bdat.py
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Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,7 @@ def setup_method(self, datapath):
self.data = []
self.test_ix = [list(range(1, 16)), [16]]
for j in 1, 2:
fname = os.path.join(self.dirpath, "test_sas7bdat_{j}.csv".format(j=j))
fname = os.path.join(self.dirpath, f"test_sas7bdat_{j}.csv")
df = pd.read_csv(fname)
epoch = pd.datetime(1960, 1, 1)
t1 = pd.to_timedelta(df["Column4"], unit="d")
Expand All @@ -38,15 +38,15 @@ def test_from_file(self):
for j in 0, 1:
df0 = self.data[j]
for k in self.test_ix[j]:
fname = os.path.join(self.dirpath, "test{k}.sas7bdat".format(k=k))
fname = os.path.join(self.dirpath, f"test{k}.sas7bdat")
df = pd.read_sas(fname, encoding="utf-8")
tm.assert_frame_equal(df, df0)

def test_from_buffer(self):
for j in 0, 1:
df0 = self.data[j]
for k in self.test_ix[j]:
fname = os.path.join(self.dirpath, "test{k}.sas7bdat".format(k=k))
fname = os.path.join(self.dirpath, f"test{k}.sas7bdat")
with open(fname, "rb") as f:
byts = f.read()
buf = io.BytesIO(byts)
Expand All @@ -61,7 +61,7 @@ def test_from_iterator(self):
for j in 0, 1:
df0 = self.data[j]
for k in self.test_ix[j]:
fname = os.path.join(self.dirpath, "test{k}.sas7bdat".format(k=k))
fname = os.path.join(self.dirpath, f"test{k}.sas7bdat")
rdr = pd.read_sas(fname, iterator=True, encoding="utf-8")
df = rdr.read(2)
tm.assert_frame_equal(df, df0.iloc[0:2, :])
Expand All @@ -73,7 +73,7 @@ def test_path_pathlib(self):
for j in 0, 1:
df0 = self.data[j]
for k in self.test_ix[j]:
fname = Path(os.path.join(self.dirpath, "test{k}.sas7bdat".format(k=k)))
fname = Path(os.path.join(self.dirpath, f"test{k}.sas7bdat"))
df = pd.read_sas(fname, encoding="utf-8")
tm.assert_frame_equal(df, df0)

Expand All @@ -84,9 +84,7 @@ def test_path_localpath(self):
for j in 0, 1:
df0 = self.data[j]
for k in self.test_ix[j]:
fname = LocalPath(
os.path.join(self.dirpath, "test{k}.sas7bdat".format(k=k))
)
fname = LocalPath(os.path.join(self.dirpath, f"test{k}.sas7bdat"))
df = pd.read_sas(fname, encoding="utf-8")
tm.assert_frame_equal(df, df0)

Expand All @@ -95,7 +93,7 @@ def test_iterator_loop(self):
for j in 0, 1:
for k in self.test_ix[j]:
for chunksize in 3, 5, 10, 11:
fname = os.path.join(self.dirpath, "test{k}.sas7bdat".format(k=k))
fname = os.path.join(self.dirpath, f"test{k}.sas7bdat")
rdr = pd.read_sas(fname, chunksize=10, encoding="utf-8")
y = 0
for x in rdr:
Expand All @@ -106,7 +104,7 @@ def test_iterator_loop(self):
def test_iterator_read_too_much(self):
# github #14734
k = self.test_ix[0][0]
fname = os.path.join(self.dirpath, "test{k}.sas7bdat".format(k=k))
fname = os.path.join(self.dirpath, f"test{k}.sas7bdat")
rdr = pd.read_sas(fname, format="sas7bdat", iterator=True, encoding="utf-8")
d1 = rdr.read(rdr.row_count + 20)
rdr.close()
Expand Down