[英]how to insert file name into "to_csv"
I have the following python formula to summarize price in a dataframe.我有以下 python 公式来汇总数据框中的价格。
def test(df1,keys=["price"]):
x=df1.groupby(keys).size()
x.to_csv("%s_price.txt" % (df1),sep='\t')
I tried as follows.我尝试如下。
test(df_Example,keys=["price"])
I want to put file name (df_Example) into the output file, so I used %s but this did not work.我想将文件名 (df_Example) 放入输出文件中,所以我使用了 %s 但这不起作用。 Does anyone know how to fix this?
有谁知道如何解决这一问题?
Thank you.谢谢你。
You could use f-strings:您可以使用 f 字符串:
def test(df1, filename, keys=["price"]):
x = df1.groupby(keys).size()
x.to_csv(f"{filename}_price.txt", sep='\t')
test(df_Example, "df_Example.csv", keys=["price"])
I think it only works in python 3.6+我认为它只适用于 python 3.6+
I guess the function should be (couldn't edit it):我猜这个函数应该是(无法编辑):
def test(df1,keys=["price"]):
x=df1.groupby(keys).size()
x.to_csv("%" % (df1),sep='\t')
A way to do it is:一种方法是:
def test_updated(df,filename,keys=["price"]):
x=df.groupby(keys).size()
filename = "{}s_price.txt".format(filename)
x.to_csv(filename,sep='\t')
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