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我正在寫一個類將sam文件轉換爲bam文件,然後對它進行排序並在python中進行索引(我知道它很容易在bash中實現,但它並不會傷害到學習更多)。Popen samtools沒有運行
sam文件已經在定義的目錄(cwd)中由該類的另一個函數生成了。
下面是代碼:
def sam2bam(self):
"""
return a sorted and index bam file in the working directory
"""
if str(self.fq)[7:9] == '24':
# create bam
comnd = "samtools view -bS " + str(self.fq)[0:10] + ".sam > " + str(self.fq)[0:10] + ".bam"
print("Converting sam to bam ... (executed command: {})\n".format(comnd))
comnd_input = shlex.split(comnd)
with open((str(self.fq)[0:10] + '.bam'), 'w') as f:
Popen(comnd_input, stdout = f, stderr = PIPE, cwd = 'G24/' + str(self.fq))
# sort bam
comnd2 = "samtools sort " + str(self.fq)[0:10] + ".bam -o " + str(self.fq)[0:10] + ".sorted.bam"
print('Sorting bam ... (executed command: {}\n)'.format(comnd2))
comnd_input2 = shlex.split(comnd2)
with open((str(self.fq)[0:10] + 'sorted.bam'), 'w') as f_sort:
Popen(comnd_input2, stdout = f_sort, stderr = PIPE, cwd = 'G24/' + str(self.fq))
# index bam
comnd3 = "samtools index " + str(self.fq)[0:10] + ".sorted.bam"
print('Indexing bam ... (executed command: {}\n)'.format(comnd3))
comnd_input3 = shlex.split(comnd3)
with open((str(self.fq)[0:10] + 'sorted.bam'), 'w') as f_index:
Popen(comnd_input3, stdout = f_index, stderr = PIPE, cwd = 'G24/' + str(self.fq))
但沒有出來
我想:
Popen(comnd_input, stdout = PIPE, stderr = PIPE, cwd = 'G24/' + str(self.fq))
還沒有任何。嘗試將其保存爲變量並執行.communicate(),沒有任何結果。
所以我不知道我做了什麼錯誤?
感謝,
XP的