TypeError：必须是没有空字节的字符串，不是str

我试图运行这个代码，对每一帧我都有相同的命令（几乎没有变化）：

traj.reset()
import os
#os.chdir(outname)
for i, frame in enumerate(traj):
    frame.superpose()
    comando = "python hollow.py -c constraint -o hollow_%s.pdb urei%s.pdb" % (i, i)
    os.system(comando)
    pml_cmd = "pymol urei%s.pdb hollow_%s.pdb -c -d 'as cartoon, urei%s;color gray90, urei%s;center chain A;set_view (-0.605158150,0.089404292,0.791067421,.795849979,0.093013920,0.598304033,-0.020089993,0.991641700,-0.127439827,.000000000,0.000000000,-202.017959595,-28.771762848,-7.683309555,10.745590210,-568.485290527,972.520690918,-20.000000000);bg white;as sphere, hollow_%s;color cyan, hollow_%s;ray;save urei%s.png' " % (i, i, i, i, i, i, i)
    os.system(pml_cmd)
    #remove = "rm urei%s.pdb hollow_%s.pdb" % (i, i)
    #os.system(remove)
os.chdir("../")

我运行这个，我得到这个错误：

---

TypeError                                 Traceback (most recent call last)
<ipython-input-8-53cd3e7bd107> in <module>()
      7     os.system(comando)
          8     pml_cmd = "pymol urei%s.pdb hollow_%s.pdb -c -d 'as cartoon, urei%s;color gray90, urei%s;center chain A;set_view (-0.605158150,0.089404292,0.791067421,.795849979,0.093013920,0.598304033,-0.020089993,0.991641700,-0.127439827,.000000000,0.000000000,-202.017959595,-28.771762848,-7.683309555,10.745590210,-568.485290527,972.520690918,-20.000000000);bg white;as sphere, hollow_%s;color cyan, hollow_%s;ray;save urei%s.png' " % (i, i, i, i, i, i, i)
----> 9     os.system(pml_cmd)
     10     #remove = "rm urei%s.pdb hollow_%s.pdb" % (i, i)
     11     #os.system(remove)

TypeError: must be string without null bytes, not str

我在网上搜索，但我找不到一个好的答案。

---

问题是 char应该被双重转义，即改为“”或者在字符串删除之前添加一个“r”：

pml_cmd = r“pymol urei％s.pdb ...”

你会得到这个特定的错误，因为在字符串的某处有一个 0，它被解释为一个NULL字符

---

我能够通过评论print来解决这个错误：

for tarfileobj in inputs:
    # print(tarfileobj)
    tarfileobj.extractall(path=t, members=None)

我可以完成print(tarfileobj.split)或打印repr或删除了空字节，或者如果它的tarfile，只是提取它。

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