在WRDS CRSP查询中使用外部文件中的Python dict值
我想从外部文件(Python dict)读取字典值(CRSP PERMNOS),并将其用于从特定表返回行的函数中。下面的代码改编自WRDS Python支持站点,可与内联编写的PERMNO值配合使用在WRDS CRSP查询中使用外部文件中的Python dict值,python,wrds,Python,Wrds,我想从外部文件(Python dict)读取字典值(CRSP PERMNOS),并将其用于从特定表返回行的函数中。下面的代码改编自WRDS Python支持站点,可与内联编写的PERMNO值配合使用 def main(): parm = {'permnos': ('22074', '20482', '10049', '19641', '18980')} data = db.raw_sql('SELECT date,permno,comnam,cusip FROM crsp.dse
def main():
parm = {'permnos': ('22074', '20482', '10049', '19641', '18980')}
data = db.raw_sql('SELECT date,permno,comnam,cusip FROM crsp.dseall WHERE permno in %(permnos)s', params=parm)
data.to_csv(r'cusip-result-2.csv')
print(data)
if __name__=="__main__":
main()
但是,我有541PERMNOS,希望避免手动内联输入它们
谢谢你的提示和指点 首先,以以下格式将每个permnos写入名为permnos.txt的文件:
22074
20482
...
18980
然后您可以执行以下操作:
def main():
parm = {'permnos': tuple([line for line in open('permnos.txt', 'r')])}
data = db.raw_sql('SELECT date,permno,comnam,cusip FROM crsp.dseall WHERE permno in %(permnos)s', params=parm)
data.to_csv(r'cusip-result-2.csv')
print(data)
if __name__=="__main__":
main()
首先,将每个permnos以以下格式写入名为permnos.txt的文件:
22074
20482
...
18980
然后您可以执行以下操作:
def main():
parm = {'permnos': tuple([line for line in open('permnos.txt', 'r')])}
data = db.raw_sql('SELECT date,permno,comnam,cusip FROM crsp.dseall WHERE permno in %(permnos)s', params=parm)
data.to_csv(r'cusip-result-2.csv')
print(data)
if __name__=="__main__":
main()