Python 3.8.3“Filenotfound”消息

Question

我目前正在学习《使用Scikit Learn、Keras和TensorFlow进行机器学习》一书。我尝试运行下面的示例，但是没有成功。链接工作正常，熊猫安装正确，操作系统、tarfile和urllib是系统包。尽管如此，我还是收到了下面的错误消息（试过Jupyter&；Spyder）：

import os 
import tarfile 
import urllib 
import pandas as pd 

DOWNLOAD_ROOT = "https://raw.githubusercontent.com/ageron/handson-ml2/master/"
HOUSING_PATH = os.path.join("datasets", "housing")
HOUSING_URL = DOWNLOAD_ROOT + "datasets/housing/housing.tgz"

def fetch_housing_data(housing_url = HOUSING_URL, housing_path = HOUSING_PATH): 
    os.makedirs(housing_path, exist_ok = True)
    tgz_path = os.path.join(housing_path, "housing.tgz") 
    urllib.request.urlretrieve(housing_url, tgz_path) 
    housing_tgz = tarfile.open(tgz_path) 
    housing_tgz.extractall(path = housing_path) 
    housing_tgz.close()
    


def load_housing_data(housing_path = HOUSING_PATH): 
    csv_path = os.path.join(housing_path, "housing.csv") 
    return pd.read_csv(csv_path)

housing = load_housing_data()
print(housing)

Jupyter中的错误消息：

--------------------------------------------------------------------------- FileNotFoundError Traceback (most recent call last) in 21 return pd.read_csv(csv_path) 22 ---> 23 housing = load_housing_data() 24 housing.head()

in load_housing_data(housing_path) 19 def load_housing_data(housing_path = HOUSING_PATH): 20 csv_path = os.path.join(housing_path, "housing.csv") ---> 21 return pd.read_csv(csv_path) 22 23 housing = load_housing_data()

~\Miniconda3\lib\site-packages\pandas\io\parsers.py in read_csv(filepath_or_buffer, sep, delimiter, header, names, index_col, usecols, squeeze, prefix, mangle_dupe_cols, dtype, engine, converters, true_values, false_values, skipinitialspace, skiprows, skipfooter, nrows, na_values, keep_default_na, na_filter, verbose, skip_blank_lines, parse_dates, infer_datetime_format, keep_date_col, date_parser, dayfirst, cache_dates, iterator, chunksize, compression, thousands, decimal, lineterminator, quotechar, quoting, doublequote, escapechar, comment, encoding, dialect, error_bad_lines, warn_bad_lines, delim_whitespace, low_memory, memory_map, float_precision) 684 ) 685 --> 686 return _read(filepath_or_buffer, kwds) 687 688

~\Miniconda3\lib\site-packages\pandas\io\parsers.py in _read(filepath_or_buffer, kwds) 450 451 # Create the parser. --> 452 parser = TextFileReader(fp_or_buf, **kwds) 453 454 if chunksize or iterator:

~\Miniconda3\lib\site-packages\pandas\io\parsers.py in init(self, f, engine, **kwds) 934 self.options["has_index_names"] = kwds["has_index_names"] 935 --> 936 self._make_engine(self.engine) 937 938 def close(self):

~\Miniconda3\lib\site-packages\pandas\io\parsers.py in _make_engine(self, engine) 1166 def _make_engine(self, engine="c"): 1167 if engine == "c": -> 1168 self._engine = CParserWrapper(self.f, **self.options) 1169 else: 1170 if engine == "python":

~\Miniconda3\lib\site-packages\pandas\io\parsers.py in init(self, src, **kwds) 1996 kwds["usecols"] = self.usecols 1997 -> 1998 self._reader = parsers.TextReader(src, **kwds) 1999 self.unnamed_cols = self._reader.unnamed_cols 2000

pandas_libs\parsers.pyx in pandas._libs.parsers.TextReader.cinit()

pandas_libs\parsers.pyx in pandas._libs.parsers.TextReader._setup_parser_source()

FileNotFoundError: [Errno 2] No such file or directory: 'datasets\housing\housing.csv'

如果有人花时间重现/提供输入，无论代码是否返回错误消息，我将不胜感激

非常感谢

Answer 1

本地文件"datasets/housing/housing.csv"仅在调用

fetch_housing_data()

您的代码示例不调用此函数。尝试在housing = load_housing_data()之前添加此行