import pandas as pd

data = {

    "a":"值一",

    "b":"值二",

    "c":"值三",

    "f":"值四"

}

data_map = {

    "a": 1,

    "b": 1,

    "c": 2,

    "d": 3

}

pd_1 = pd.DataFrame.from_dict(data,orient="index",columns=['value'])

pd_1 = pd_1.reset_index().rename(columns={"index":"key"})

pd_2 = pd.DataFrame.from_dict(data_map,orient="index",columns=['value_1'])

pd_2 = pd_2.reset_index().rename(columns={"index":"key"})

pd_3 = pd.merge(pd_1,pd_2,on="key",how="left")

# pd_3 = pd.concat([pd_1,pd_2],axis=1)

pd_3 = pd_3.drop(columns=["value"])

pd_3 = pd_3.fillna(0)

print(pd_3)

data_dict = {}

def map_dict(item):

    data_dict[item["key"]] = item["value_1"]

pd_3.apply(map_dict,axis=1)

print(data_dict)

'''

  key  value_1

0   a      1.0

1   b      1.0

2   c      2.0

3   f      0.0

{'a': 1.0, 'b': 1.0, 'c': 2.0, 'f': 0.0}

'''