例如,当我安装一些python软件包pandas
时,我想使用以下命令:
conda install pandas
这确实安装了pandas
的某些开销,但不是全部!
当我运行以下代码时:
import pandas as pd
df = pd.DataFrame()
df.to_excel('a_excel_file.xlsx')
它给了我错误:
Traceback (most recent call last):
File "<input>", line 1, in <module>
File "D:\Miniconda\envs\to_be_deleted2\lib\site-packages\pandas\core\generic.py", line 2181, in to_excel
engine=engine,
File "D:\Miniconda\envs\to_be_deleted2\lib\site-packages\pandas\io\formats\excel.py", line 726, in write
writer = ExcelWriter(stringify_path(writer), engine=engine)
File "D:\Miniconda\envs\to_be_deleted2\lib\site-packages\pandas\io\excel\_openpyxl.py", line 18, in __init__
from openpyxl.workbook import Workbook
File "D:\PyCharm Professional 2019.1.3\helpers\pydev\_pydev_bundle\pydev_import_hook.py", line 21, in do_import
module = self._system_import(name, *args, **kwargs)
ModuleNotFoundError: No module named 'openpyxl'
像openpyxl
一样的外观没有被安装。为什么会这样?如何解决?
答案 0 :(得分:1)
openpyxl
是pandas
的可选依赖项,这就是安装pandas
时未安装它的原因。
pandas
具有许多这样的可选依赖关系,这些依赖关系添加了有用但不是核心的功能-请参阅installation documentation以获取完整列表。