Question

这是我的代码：

from Bio.Seq import Seq

from Bio.Alphabet import IUPAC

my_seq = Seq("GATCG", IUPAC.unambiguous_dna)

for index, letter in enumerate(my_seq):

   print("%i %s" %(index, letter))

   print (len(my_seq))

我收到错误“无法从Bio.Seq导入Seq”。

终端错误如下：

 Traceback (most recent call last):
  File "sequence-length.py", line 1, in <module>
    from Bio.Seq import Seq
  File "/home/tanuj/.local/lib/python2.7/site-packages/Bio/Seq.py", line 21, in <module>
    import string  # for maketrans only
  File "/home/tanuj/Desktop/biopython/scripts-test/string.py", line 1, in <module>
    from Bio.Seq import Seq
ImportError: cannot import name Seq

我不确定问题是什么，因为代码工作正常，但过了一段时间，解释器无法导入Seq并开始显示错误。我该如何解决这个问题？

Answer 1

你的剧本：

from Bio.Seq import Seq

from Bio.Alphabet import IUPAC

my_seq = Seq("GATCG", IUPAC.unambiguous_dna)

print(len(my_seq))

for index, letter in enumerate(my_seq):

    print(index, letter)

在Python 3中适合我：

% python3 test.py
5
0 G
1 A
2 T
3 C
4 G

阅读您的错误消息，我猜您的问题是您有一个名为string.py的个人代码文件（“/home/tanuj/Desktop/biopython/scripts-test/string.py”），这与Python混淆了库它要导入的string.py：

% touch string.py
% python3 test.py
Traceback (most recent call last):
  File "test.py", line 1, in <module>
    from Bio.Seq import Seq
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/Bio/Seq.py", line 25, in <module>
    from Bio._py3k import range
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/Bio/_py3k/__init__.py", line 170, in <module>
    from urllib.request import urlopen, Request, urlretrieve, urlparse, urlcleanup
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 88, in <module>
    import http.client
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/http/client.py", line 71, in <module>
    import email.parser
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/email/parser.py", line 12, in <module>
    from email.feedparser import FeedParser, BytesFeedParser
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/email/feedparser.py", line 27, in <module>
    from email._policybase import compat32
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/email/_policybase.py", line 7, in <module>
    from email import header
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/email/header.py", line 16, in <module>
    import email.quoprimime
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/email/quoprimime.py", line 44, in <module>
    from string import ascii_letters, digits, hexdigits
ImportError: cannot import name 'ascii_letters'
%

将您的个人string.py文件重命名为其他内容。

在Python 2.7和3.6

1 个答案: