0 Pandas generate new column function based on condition problem 1 pandas apply function to multiple columns with condition and create new columns 1 Apply function on multiple columns and create new column based on condition 1 Python Create new columns based on other colu...
df = pd.DataFrame(data) # Creating a new column 'D' based on a condition in column 'A' df['D'] = df['A'].apply(lambda x: 'Even' if x % 2 == 0 else 'Odd') print(df) Output: A D 0 1 Odd 1 2 Even 2 3 Odd 使用lambda函数来检查' a '中的每个元素是偶数还是奇数,并将...
DataFrame.lookup(row_labels, col_labels)Label-based “fancy indexing” function for DataFrame. DataFrame.pop(item)返回删除的项目 DataFrame.tail([n])返回最后n行 DataFrame.xs(key[, axis, level, drop_level])Returns a cross-section (row(s) or column(s)) from the Series/DataFrame. DataFrame.is...
importpandasaspd data={'A':[1,2,3]}df=pd.DataFrame(data)# Creating anewcolumn'D'based on a conditionincolumn'A'df['D']=df['A'].apply(lambda x:'Even'ifx%2==0else'Odd')print(df)Output:AD01Odd12Even23Odd 使用lambda函数来检查' a '中的每个元素是偶数还是奇数,并将结果分配给' D ...
1 Python/Pandas - New column based on multiple conditions 1 python : several cumprods per column 2 New column based in multiple conditions 2 new column base on multi column condition 1 Create new column based on multiple conditions of existing column while manipulating ex...
1. 1 当两表连接键字段名相同的时候,直接用 on就可以 pd.merge(df1,df2, on = 'ID')1.2 当有多个键关联时,用中括号将多个键框起来,用on连接 pd.merge(df1,df3, on = ['ID','Gender','Age'])1.3 当两表连接键字段名不同的时候,需要分别指定左右表的连接键 pd.merge(df1,df4, left_on = '...
A fairly common use of thekeysargument is to override the column names when creating a newDataFramebased on existingSeries. Notice how the default behaviour consists on letting the resultingDataFrameinherit the parentSeries’ name, when these existed. ...
Help on function to_latex in module pandas.core.generic: to_latex(self, buf=None, columns=None, col_space=None, header=True, index=True, na_rep='NaN', formatters=None, float_format=None, sparsify=None, index_names=True, bold_rows=False, column_format=None, longtable=None, escape=None...
If a list of string is given it is assumed to be aliases for the column names. freeze_panes tuple of int (length 2), optional 冻结窗格, 第一个参数为行, 第二个参数为列, 如冻结首行应写为(1,0) 和read_excel类似,包含中文时无需注明encoding 示例1: 示例2: 除此之外还可以用如下这种形式...
Assign a Column Based on Another Column We can also create a column based on another column in a pandas dataframe. For this, we will first create a series based on another column. Then, we can use theassign()method and pass the column name with the series as its input to assign the ...