1 filter rows where nan appear in a df column 4 Filter NaN values in a dataframe column 2 Select rows containing a NaN following a specific value in Pandas 0 Select multiple rows from pandas data frame where one of column contains some values as NaN 1 Filter NaN r...
6、筛选df.filter() ★★☆☆☆ df.filter(items=['Q1', 'Q2']) # 选择两列 df.filter(regex='Q', axis=1) # 列名包含Q的列 df.filter(regex='e$', axis=1) # 以e结尾的列 df.filter(regex='1$', axis=0) # 正则,索引名以1结尾 df.filter(like='2', axis=0) # 索引中有2的 # ...
df_test.query('Title.str.startswith("T") and Subjects.fillna("").str.contains("Math")') Title Subjects0Title1 Math; Science1Title2 English; Math Change the engine fordf.queryfromnumexpr(default) topython: df_test.query('Title.str.startswith("T") and Subjects.str.contains("Math")', ...
isin方法还可以与其他条件组合使用,例如df[(df['column1'] > 10) & (df['column2'].isin(['value1', 'value2']))]可以选择满足条件的数据。除了上述方法,pandas库还提供了许多其他的选择和过滤数据的函数和方法。例如,我们可以使用query方法来根据条件选择数据,使用filter方法来选择特定列的数据,使用drop...
from io import StringIO pd.read_csv(StringIO(web_data.text)) 回到顶部 二、导出数据 # 导出数据到CSV文件 df.to_csv('filename.csv') # 导出数据到Excel文件 df.to_excel('filename.xlsx', index=True) # 导出数据到 SQL 表 df.to_sql(table_name, connection_object) ...
between():根据在指定范围内的值筛选行。df[df['column_name'].between(start, end)] # Filter rows based on values within a range df[df['Order Quantity'].between(3, 5)] 字符串方法:根据字符串匹配条件筛选行。例如str.startswith(), str.endswith(), str.contains() ...
使用:
过滤pandas的标准代码类似于: output = df['Column'].str.contains('string') strings = ['string 1', 'string 2', 'string3'] 不过,我不想使用'string‘,而是过滤它,让它遍历列表“string”中的一个字符串集合。所以我尝试了下面这样的方法 output = df['Column'].str 浏览15提问于2019-04-02得票...
= pd.read_csv("nba.csv")# overwriting column with replaced value of agedata["Age"]= data["Age"].replace(25.0, "Twenty five")# creating a filter for age column # where age = "Twenty five"filter = data["Age"]=="Twenty five"# printing only filtered columnsdata.where(filter).dropna...
default 0Row (0-indexed) to use for the column labels of the parsedDataFrame. If a list of integers is passed those row positions willbe combined into a ``MultiIndex``. Use None if there is no header.names : array-like, default NoneList of column names to use. If file contains no ...