LiClipse Python中的编译扩展文件错误报告

doc_holder_str = ''
sample_H_value = open("C:\testGupixwin\BX-N-H.HED", "r")
standard_conc_value = open("C:\testGupixwin\gupixwin_H_stdConc.txt", "r")
sample_H_value_str = sample_H_value.readline()
while sample_H_value_str is not '' :
    stripper_sample_H = float(sample_H_value_str[5:].lstrip(' '))
doc_holder_str = ''
sample_H_value = open("C:\t