在Pandas中,DataFrame对象的`columns`属性直接返回包含列名的Index对象。该代码会正确输出列名。解析步骤如下:1. `df.columns`是Pandas库中DataFrame的标准属性,功能是显示所有列名。2. `print()`函数将列名以可读格式输出,例如显示为列表形式。3. 题目代码语法正确,能够实现列名展示的功能。4. 未发现代码缺失或不完整的...
Inside the Python interpreter, the help() function pulls up documentation strings for various modules, functions, and methods. These doc strings are similar to Java’s javadoc. The dir() function tells you what the attributes of an object are. help展示function之类的documentation dir显示object的属...
print("\nDataFrame created from another DataFrame:\n", df_copy) # NumPy的masked Array创建DataFrame masked_array = np.ma.array([[1, 2], [3, 4]], mask=[[False, True], [True, False]]) df_masked = pd.DataFrame(masked_array, columns=['Column1', 'Column2']) ...
columns='name', aggfunc=sum) 2 3 In [28]: total_number 4 Out[28]: 5 name Aaden Aadhya Aaliyah Aanya Aarav Aaron Aarush Ab Abagail \ 6 year 7 1880 NaN NaN NaN NaN NaN 102.0 NaN NaN NaN 8 1881 NaN NaN NaN NaN NaN 94.0 NaN NaN NaN 9 1882 NaN NaN NaN NaN NaN 85.0 NaN NaN...
, 'bb') # sep 可以用一个字符串作为分隔符 print('aa', 'bb', sep=',') aa bb aa,bb 2...
Pretty-print an entire Pandas DataFrameTo pretty-print format an entire Pandas DataFrame, we use Pandas options such as pd.options.display.max_columns, pd.options.display.max_rows, and pd.options.display.width to set and customize global behaviour related to display/printing the DataFrame....
请阅读下面一段程序: import pandas as pd print(pd.DataFrame([[2, 3],] * 3, columns=['A', 'B']).apply(lambda x: x 1)) 执行上述程序后,最终输出的结果为( )。 A. A B 0 3 2 1 3 2 2 3 2 B. A B 0 2 3 1 2 3 2 2 3 C. A B 0 3 4 1 3 4 2 3 4 D. ...
df_medals.drop(columns=['Unnamed: 7','Unnamed: 8','Rank by Total'], inplace=True) df_medals <class 'pandas.core.frame.DataFrame'> RangeIndex: 93 entries, 0 to 92 Data columns (total 9 columns): # Column Non-Null Count Dtype ...
To print the Pandas DataFrame without an index you can useDataFrame.to_string()and set the index parameter as False. A Pandas DataFrame is a powerful data structure that consists of rows and columns, each identified by their respective row index and column names. When you print a DataFrame,...
Example 1: Find Dimensions of 2D List Using len() FunctionIn this first example, we are going to use Python’s len() function to get the measurements of the 2D list:# Get the number of rows num_rows = len(my_list) # Get the number of columns num_cols = len(my_list[0]) print...