莫烦 python Pandas 学习笔记 2017.12.7.11
2017-12-07 11:45
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Pandas 导入导出
源地址https://morvanzhou.github.io/tutorials/data-manipulation/np-pd/3-5-pd-to/读取 .csv 文件
- 示范档案下载 student.csv https://pan.baidu.com/s/1eScY2f4[百度地址]
实验环境:Ubuntu 16.04 LTS
Jupyter notebook
Python 3.5
- Ubuntu 文件 复制
sudo mv student.csv ~/pandas_learn
- 莫烦 Python 源码
原文代码:import pandas as pd #加载模块 #读取csv data = pd.read_csv('students.csv') #打印出data print(data)
直接抄写代码会出现:
-------------------------------------------------- FileNotFoundErrorTraceback (most recent call last) <ipython-input-6-08b8bb9e90fd> in <module>() 1 import pandas as pd 2 ----> 3 data = pd.read_csv('students.csv') 4 5 print(data) /usr/local/lib/python3.5/dist-packages/pandas/io/parsers.py in parser_f(filepath_or_buffer, sep, delimiter, header, names, index_col, usecols, squeeze, prefix, mangle_dupe_cols, dtype, engine, converters, true_values, false_values, skipinitialspace, skiprows, nrows, na_values, keep_default_na, na_filter, verbose, skip_blank_lines, parse_dates, infer_datetime_format, keep_date_col, date_parser, dayfirst, iterator, chunksize, compression, thousands, decimal, lineterminator, quotechar, quoting, escapechar, comment, encoding, dialect, tupleize_cols, error_bad_lines, warn_bad_lines, skipfooter, skip_footer, doublequote, delim_whitespace, as_recarray, compact_ints, use_unsigned, low_memory, buffer_lines, memory_map, float_precision) 653 skip_blank_lines=skip_blank_lines) 654 --> 655 return _read(filepath_or_buffer, kwds) 656 657 parser_f.__name__ = name /usr/local/lib/python3.5/dist-packages/pandas/io/parsers.py in _read(filepath_or_buffer, kwds) 403 404 # Create the parser. --> 405 parser = TextFileReader(filepath_or_buffer, **kwds) 406 407 if chunksize or iterator: /usr/local/lib/python3.5/dist-packages/pandas/io/parsers.py in __init__(self, f, engine, **kwds) 762 self.options['has_index_names'] = kwds['has_index_names'] 763 --> 764 self._make_engine(self.engine) 765 766 def close(self): /usr/local/lib/python3.5/dist-packages/pandas/io/parsers.py in _make_engine(self, engine) 983 def _make_engine(self, engine='c'): 984 if engine == 'c': --> 985 self._engine = CParserWrapper(self.f, **self.options) 986 else: 987 if engine == 'python': /usr/local/lib/python3.5/dist-packages/pandas/io/parsers.py in __init__(self, src, **kwds) 1603 kwds['allow_leading_cols'] = self.index_col is not False 1604 -> 1605 self._reader = parsers.TextReader(src, **kwds) 1606 1607 # XXX pandas/_libs/parsers.pyx in pandas._libs.parsers.TextReader.__cinit__ (pandas/_libs/parsers.c:4209)() pandas/_libs/parsers.pyx in pandas._libs.parsers.TextReader._setup_parser_source (pandas/_libs/parsers.c:8873)() FileNotFoundError: File b'students.csv' does not exist
不要被这么长的报错吓到 ,直接看最后一行
FileNotFoundError: File b'students.csv' does not exist
没有找到文件
students.csv
再看 莫烦 Python 下载的文件名是
student.csv
- FileNotFoundError: File b’students.csv’ does not exist 解决方案
1. 修改 csv 文件名为 students
sudo mv student.csv sudents.csv
2. 修改代码
import pandas as pd data = pd.read_csv('student.csv') print(data)
运行结果
Student ID name age gender 0 1100 Kelly 22 Female 1 1101 Clo 21 Female 2 1102 Tilly 22 Female 3 1103 Tony 24 Male 4 1104 David 20 Male 5 1105 Catty 22 Female 6 1106 M 3 Female 7 1107 N 43 Male 8 1108 A 13 Male 9 1109 S 12 Male 10 1110 David 33 Male 11 1111 Dw 3 Female 12 1112 Q 23 Male 13 1113 W 21 Female
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