日常问题解决汇总

日常操作时遇到各种报错或新想法，所遇问题以及搜索到的解决方案参考来源大汇总（持续更新）

Python数据科学库

1. URLError:

# 原代码
import seaborn as sns
planets = sns.load_dataset('planets')

解决：从github下载数据集，用pandas调用

• mwaskom/seaborn-data - GitHub

import pandas as pd
planets = pd.read_csv('./seaborn-data-master/planets.csv')

2. Keyerror: ‘Date’

• Keyerror ‘Date’ when using pandas datareader - Stackoverflow

I received the ‘Keyerror ‘Date’ when using pandas datareader’ error and found two errors in my script that fixed the issue:

1. The name of the entity was incorrect, for example using ‘APPL’ instead of ‘AAPL’.
2. There was no data for the date parameters I was using.

# 解决代码
# Use 'BTC-USD' stock/security value
import pandas as pd
import pandas_datareader.data as web
import datetime as dt

start = dt.datetime(2017, 1, 1)
end = dt.datetime(2019, 11, 30)

df = web.DataReader('BTC-USD', 'yahoo', start, end)
df.to_csv('BTC.csv')
print(df.head())

• 如不确定数据集起始时间也可以设置时间，如下

yhoo = data.DataReader('BTC-USD', data_source='yahoo')
yhoo.head()

yhoo.tail()

• 可以看出数据集起始时间是2015年至2020年

3. NotImplementedError: data_source=None is not implemented

# 原代码
from pandas_datareader impoart data
goog = data.DataReader('GOOG', start='2004', end='2016')
goog.head()

• Issue when running DataReader - pandas-datareader issue - GitHub

As of v0.7.0 Google finance and Morningstar have been immediately deprecated due to large changes in their API and no stable replacement.

4. TypeError: ‘float’ object cannot be interpreted as an integer

# 原代码
import numpy as np
rng = np.random.RandomState(42)
rng.rand(1E6)

解决方案：

# [1E6]是float类型，所以先转换为int
rng.rand(int(1E6))

• Why doesn’t scientific notation work in Numpy - Stackoverflow

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终端

1. pip install 下载库时中途报错，切换网络重试

• 诡异的错误：OpenSSL.SSL.Error: [(‘SSL routines’, ‘ssl3_get_record’, ‘decryption failed or bad record mac’)

2. 安装homebrew时显示 connection refuse

• Homebrew installation on Mac OS X Failed to connect to raw.githubusercontent.com port 443

解决方案：

1. 将网址打开并保存至本地：https://raw.githubusercontent.com/Homebrew/install/master/install.sh
2. 打开终端，运行：/bin/bash path-to/install.sh （path-to是网址保存的绝对路径）

1. open the home page of brew https://brew.sh/
2. copy the URL from the install cmd and open it on your browser https://raw.githubusercontent.com/Homebrew/install/master/install.sh
3. right-click and save it to your computer
4. open a terminal and run it with: /bin/bash path-to/install.sh

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Markdown

1. 正文序号下继续分级，多空几个空格可以实现

• 研究了一个markdown做多级编号

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软件安装及配置

1. 设置Mac终端、pip、Anaconda、PyCharm共用一套环境

• 设置Mac终端、pip、Anaconda、PyCharm共用一套环境

2.