我正在尝试从raspberry pi上的requirements.txt文件安装python依赖项。这在我最初测试它的ubuntu VM映像上运行良好，所以我有点困惑。
当我运行-v
pip3 install -v -r requirements.txt输出中没有错误，所以我添加了pip3 show <pick a package from my requirements.txt file>标志并再次运行：
certifi==2017.11.5
chardet==3.0.4
coverage==4.4.2
Django==2.0.1
gitdb2==2.0.3
GitPython==2.1.9
gunicorn==19.7.1
idna==2.6
netifaces==0.10.6
nose==1.3.7
psycopg2==2.7.3.2
python-nmap==0.6.1
pytz==2017.3
requests==2.18.4
simplejson==3.13.2
smmap2==2.0.3
urllib3==1.22
xml2json==0.1
几乎相同的输出，包括你期望找到正确的包，连接到源等的所有东西。
确认未安装任何软件包：
> pip install certifi
Collecting certifi
Downloading certifi-2018.1.18-py2.py3-none-any.whl (151kB)
100% |████████████████████████████████| 153kB 187kB/s
Installing collected packages: certifi
Successfully installed certifi-2018.1.18
只返回没有输出的提示。
那么，我只是下载包而不安装它们？怎么了？
这是我的要求文件：
pip install certifi但是，如果我尝试逐个安装软件包，它可以正常工作：
pip install chardet所以，我不认为这是一个依赖性问题。
以下是完整的输出，请注意，我已经尝试过运行一次并下载了软件包，然后我运行了root@omniscanner:~# pip3 install -r /opt/omnicron-scanner/requirements.txt
Collecting certifi==2017.11.5 (from -r /opt/omnicron-scanner/requirements.txt (line 1))
Using cached certifi-2017.11.5-py2.py3-none-any.whl
Requirement already satisfied: chardet==3.0.4 in /usr/local/lib/python3.5/dist-packages (from -r /opt/omnicron-scanner/requirements.txt (line 2))
Collecting coverage==4.4.2 (from -r /opt/omnicron-scanner/requirements.txt (line 3))
Using cached https://www.piwheels.org/simple/coverage/coverage-4.4.2-cp35-cp35m-linux_armv6l.whl
Collecting Django==2.0.1 (from -r /opt/omnicron-scanner/requirements.txt (line 4))
Using cached Django-2.0.1-py3-none-any.whl
Collecting gitdb2==2.0.3 (from -r /opt/omnicron-scanner/requirements.txt (line 5))
Using cached gitdb2-2.0.3-py2.py3-none-any.whl
Collecting GitPython==2.1.9 (from -r /opt/omnicron-scanner/requirements.txt (line 6))
Using cached GitPython-2.1.9-py2.py3-none-any.whl
Collecting gunicorn==19.7.1 (from -r /opt/omnicron-scanner/requirements.txt (line 7))
Using cached gunicorn-19.7.1-py2.py3-none-any.whl
Collecting idna==2.6 (from -r /opt/omnicron-scanner/requirements.txt (line 8))
Using cached idna-2.6-py2.py3-none-any.whl
Collecting netifaces==0.10.6 (from -r /opt/omnicron-scanner/requirements.txt (line 9))
Using cached https://www.piwheels.org/simple/netifaces/netifaces-0.10.6-cp35-cp35m-linux_armv6l.whl
Collecting nose==1.3.7 (from -r /opt/omnicron-scanner/requirements.txt (line 10))
Using cached nose-1.3.7-py3-none-any.whl
Collecting psycopg2==2.7.3.2 (from -r /opt/omnicron-scanner/requirements.txt (line 11))
Using cached https://www.piwheels.org/simple/psycopg2/psycopg2-2.7.3.2-cp35-cp35m-linux_armv6l.whl
Collecting python-nmap==0.6.1 (from -r /opt/omnicron-scanner/requirements.txt (line 12))
Using cached https://www.piwheels.org/simple/python-nmap/python_nmap-0.6.1-py3-none-any.whl
Collecting pytz==2017.3 (from -r /opt/omnicron-scanner/requirements.txt (line 13))
Using cached pytz-2017.3-py2.py3-none-any.whl
Collecting requests==2.18.4 (from -r /opt/omnicron-scanner/requirements.txt (line 14))
Using cached requests-2.18.4-py2.py3-none-any.whl
Collecting simplejson==3.13.2 (from -r /opt/omnicron-scanner/requirements.txt (line 15))
Using cached https://www.piwheels.org/simple/simplejson/simplejson-3.13.2-cp35-cp35m-linux_armv6l.whl
Collecting smmap2==2.0.3 (from -r /opt/omnicron-scanner/requirements.txt (line 16))
Using cached smmap2-2.0.3-py2.py3-none-any.whl
Collecting urllib3==1.22 (from -r /opt/omnicron-scanner/requirements.txt (line 17))
Using cached urllib3-1.22-py2.py3-none-any.whl
Collecting xml2json==0.1 (from -r /opt/omnicron-scanner/requirements.txt (line 18))
Could not find a version that satisfies the requirement xml2json==0.1 (from -r /opt/omnicron-scanner/requirements.txt (line 18)) (from versions: 1.1)
No matching distribution found for xml2json==0.1 (from -r /opt/omnicron-scanner/requirements.txt (line 18))
＆amp;手动App以显示命令在仅尝试一次安装一个包时起作用：
1 import React from "react";
2 import gql from "graphql-tag";
3 import { graphql, Query } from 'react-apollo';
4 import { withApollo } from "react-apollo";
5 import ResolutionForm from "./ResolutionForm";
6 import GoalForm from "./GoalForm";
7 import RegisterForm from "./RegisterForm";
8 import LoginForm from "./LoginForm";
9 import Goal from "./resolutions/Goal";
10
11 const RESOLUTIONS_QUERY = gql`
12 query Resolutions {
13 resolutions {
14 _id
15 name
16 completed
17 goals {
18 _id
19 name
20 completed
21 }
22 }
23 user {
24 _id
25 }
26 }
27 `;
28
29 const App = ({ refetch }) => (
30 <Query
31 query={RESOLUTIONS_QUERY}
32 fetchPolicy={refetch ? 'cache-and-network': 'cache-first'}
33 >
34 {({ loading, data: {resolutions, client, user } }) => {
35 if (loading) return <span>loading....</span>
36 return (
37 <div>
38 {user._id ? (
39 <button
40 onClick={() => {
41 Meteor.logout();
42 client.resetStore();
43 }}
44 >
45 Logout
46 </button>
47 ) : (
48 <div>
49 <RegisterForm client={client}/>
50 <LoginForm client={client}/>
51 </div>
52 )}
53 <ResolutionForm/>
54 <ul>
55 {resolutions.map(resolution => (
56 <li key={resolution._id}>
57 <span
58 style={{
59 textDecoration: resolution.completed ? "line-through" : "none"
60 }}
61 >
62 {resolution.name}
63 </span>
64 <ul>
65 {resolution.goals.map(goal => (
66 <Goal goal={goal} key={goal._id}/>
67 ))}
68 </ul>
69 <GoalForm resolutionId={resolution._id}/>
70 </li>
71 ))}
72 </ul>
73 </div>
74 );
75 }}
76 </Query>
77 );
78
79 export default withApollo(App);