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import base64 | |
import json | |
import numbers | |
import pickle | |
import warnings | |
from collections import OrderedDict | |
def load_list(filename, encoding='utf-8', start=0, stop=None): | |
assert isinstance(start, numbers.Integral) and start >= 0 | |
assert (stop is None) or (isinstance(stop, numbers.Integral) and stop > start) | |
lines = [] | |
with open(filename, 'r', encoding=encoding) as f: | |
for _ in range(start): | |
f.readline() | |
for k, line in enumerate(f): | |
if (stop is not None) and (k + start > stop): | |
break | |
lines.append(line.rstrip('\n')) | |
return lines | |
def save_list(filename, list_obj, encoding='utf-8', append_break=True): | |
with open(filename, 'w', encoding=encoding) as f: | |
if append_break: | |
for item in list_obj: | |
f.write(str(item) + '\n') | |
else: | |
for item in list_obj: | |
f.write(str(item)) | |
def load_json(filename, encoding='utf-8'): | |
with open(filename, 'r', encoding=encoding) as f: | |
data = json.load(f, object_pairs_hook=OrderedDict) | |
return data | |
def save_json(filename, data, encoding='utf-8', indent=4, cls=None, sort_keys=False): | |
if not filename.endswith('.json'): | |
filename = filename + '.json' | |
with open(filename, 'w', encoding=encoding) as f: | |
json.dump(data, f, indent=indent, separators=(',',': '), | |
ensure_ascii=False, cls=cls, sort_keys=sort_keys) | |
def load_bytes(filename, use_base64: bool = False) -> bytes: | |
"""Open the file in bytes mode, read it, and close the file. | |
References: | |
pathlib.Path.read_bytes | |
""" | |
with open(filename, 'rb') as f: | |
data = f.read() | |
if use_base64: | |
data = base64.b64encode(data) | |
return data | |
def save_bytes(filename, data: bytes, use_base64: bool = False) -> int: | |
"""Open the file in bytes mode, write to it, and close the file. | |
References: | |
pathlib.Path.write_bytes | |
""" | |
if use_base64: | |
data = base64.b64decode(data) | |
with open(filename, 'wb') as f: | |
ret = f.write(data) | |
return ret | |
def load_as_base64(filename) -> bytes: | |
warnings.warn('khandy.load_as_base64 will be deprecated, use khandy.load_bytes instead!') | |
return load_bytes(filename, True) | |
def load_object(filename): | |
with open(filename, 'rb') as f: | |
return pickle.load(f) | |
def save_object(filename, obj): | |
with open(filename, 'wb') as f: | |
pickle.dump(obj, f) | |