python中的ByteIO()文件无法上传到Bitbucket,函数会反复调用

我有两个函数,它们可以相互调用,其中一个是上传函数,它将文件上传到Bitbucket,一个上传的文件是由用户拖放的,另一个是拖放的文件与另一个目录中的另一个文件连接的结果,拖放的文件被正确上传到Bitbucket,但另一个函数(函数的名称是gbl_delta_historization_api)中的文件连接结果无法上传到Bitbaret(这个文件的类型应该是BytesIO),这个函数通过上传函数一次又一次地调用,为了停止它,我应该杀死脚本,在下面的代码中你可以看到上传函数的一部分:这是因为

 def upload(
        self, belle_type: str, environment: str, user: str, token: str,
        project: str, repo: str, branch: str, file,
        filename="auto", overwrite=False
    ) -> str:
    if belle_type == "gbl_delta_business":
            file.seek(0)
            return gbl_delta_historization_api(
                git_login=user,
                git_write_token=token,
                file=file.read(),
                upload=self.upload,
                enviro=environment,
                belle_type=belle_type,
                belle_git_project=project,
                belle_git_repo=repo,
                belle_git_branch=branch
            )
    return fn if res.status_code in [200, 409] else "" 

另一个函数的名称是gbl_delta_historization_api,此函数在函数的开头和结尾两次调用upload函数,如下所示:

def gbl_delta_historization_api(
    git_login, 
    git_write_token,
    file,
    upload,
    enviro='uat',
    #filename='dqchecks_belle_gds_uat.csv',
    belle_type='gbl_delta_business',
    belle_git_project='DQM',
    belle_git_repo='dqm-belle-repo',
    belle_git_branch='master'
):

 #some codes for the calculation and concatenation of files are here

        df_real_out_buffer = BytesIO()
        df_real_out.to_csv(df_real_out_buffer, sep=";", index=False)

        # call the function that was passed as an argument
        return upload(
            belle_type="gbl_delta_business" if enviro=="prod" else "gbl_delta_uat_business",
            environment=enviro,
            user=git_login,
            token=git_write_token,
            project=belle_git_project,
            repo=belle_git_repo,
            branch=belle_git_branch,
            file=df_real_out_buffer,
            filename="auto",
            overwrite=False
        )
    else:
        return res2.status_code
    return  

我该如何解决这个问题?实际上,连接的结果是数据帧和正确的结果,但要将文件上传到Bitbucket,我们需要BytesIO文件