pymod_main.py 文件源码

def is_sequence_file(self, file_name, file_format, show_error=True):
        """
        Try to open a sequence file using Biopython. Returns 'True' if the file is a valid fasta file.
        """
        valid_file = False
        file_handler = None
        try:
            file_handler = open(file_name,"r")
            r = list(SeqIO.parse(file_handler, file_format))
            if len(r) > 0:
                valid_file = True
            else:
                valid_file = False
        except:
            valid_file = False
        if file_handler != None:
            file_handler.close()
        if not valid_file:
            title = "File Type Error"
            message = "The selected File is not a valid %s." % (pmdt.supported_sequence_file_types[file_format])
            if show_error:
                self.show_error_message(title,message)
        return valid_file