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已信任 Jupyter 服务器: 本地 Python 3: Not Started [1] import pandas as pd import numpy as np [3] df = pd.DataFrame(np.random.randn(5,3),index=['a','b','e','f' 阅读全文
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pd的df中已经可以根据列名获取数据了,为什么还需要列名的下标呢?特殊要求呗 阅读全文
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已信任 Jupyter 服务器: 本地 Python 3: Not Started [1] import pandas as pd import numpy as np [6] df = pd.DataFrame(np.random.randn(10,4), index=pd.date_range( 阅读全文
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已信任 Jupyter 服务器: 本地 Python 3: Not Started [1] import pandas as pd import numpy as np [3] df = pd.DataFrame(np.random.randn(10,4)) df 0 1 2 3 0 -0.1677 阅读全文
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已信任 Jupyter 服务器: 本地 Python 3: Not Started [60] import pandas as pd import numpy as np [61] s = pd.Series([877,865,874,890,912]) s 0 877 1 865 2 874 3 阅读全文
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已信任 Jupyter 服务器: 本地 Python 3: Not Started [36] import pandas as pd import numpy as np [37] # .loc基于标签 # .iloc基于索引 [39] df = pd.DataFrame(np.random.ran 阅读全文
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已信任 Jupyter 服务器: 本地 Python 3: Not Started [13] import pandas as pd import numpy as np [15] s = pd.Series([' Tom',' xiaoming','john ']) s 0 Tom 1 xiaom 阅读全文
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已信任 Jupyter 服务器: 本地 Python 3: Not Started [4] import pandas as pd import numpy as np df = pd.DataFrame({ 'date':pd.date_range(start='20210714',periods 阅读全文
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已信任 Jupyter 服务器: 本地 Python 3: Not Started [11] import pandas as pd import numpy as np [13] df = pd.DataFrame({ 'a':pd.date_range(start='2021-07-14', p 阅读全文