If you are using Python3.
then you can use Print Function :
your_data = {"Purchase Amount": 'TotalAmount'}
print(your_data, file=open('D:\log.txt', 'w'))
For python2
this is the example of Python Print String To Text File
def my_func():
"""
this function return some value
:return:
"""
return 25.256
def write_file(data):
"""
this function write data to file
:param data:
:return:
"""
file_name = r'D:\log.txt'
with open(file_name, 'w') as x_file:
x_file.write('{} TotalAmount'.format(data))
def run():
data = my_func()
write_file(data)
run()