python修炼计划 从基本学起
python修炼计划 从基本学起，学习一门热门语言。
计算机语言都是从hello world开始
mac或linux下自带python，windows需要安装，具体安装步骤问度娘。
建立python脚本如下，vim helloword.py
#!/usr/bin/python
print "hello, world!";
print "you can't imagine how powerful you are!";
需要加可执行权限，方法是在命令行下输入chmod +x helloworld.py
然后运行./helloworld.py
注意：
在mac下安装pylint可能遇到点问题，
luntekimbp:python apple$ /usr/bin/python -m pip install pylint
/usr/bin/python: no module named pip
解决方法是安装pip,
sudo easy_install pip
这样就可以安装pylint了
安装过程又出现
aluntekimbp:python apple$ /usr/bin/python -m pip install pylint
collecting pylint
using cached pylint-1.7.1-py2.py3-none-any.whl
collecting astroid>=1.5.1 (from pylint)
using cached astroid-1.5.3-py2.py3-none-any.whl
collecting singledispatch; python_version < "3.4" (from pylint)
using cached singledispatch-3.4.0.3-py2.py3-none-any.whl
collecting mccabe (from pylint)
using cached mccabe-0.6.1-py2.py3-none-any.whl
collecting backports.functools-lru-cache; python_version == "2.7" (from pylint)
using cached backports.functools_lru_cache-1.4-py2.py3-none-any.whl
requirement already satisfied: six in /system/library/frameworks/python.framework/versions/2.7/extra
s/lib/python (from pylint)
collecting isort>=4.2.5 (from pylint)
using cached isort-4.2.15-py2.py3-none-any.whl
collecting configparser; python_version == "2.7" (from pylint)
using cached configparser-3.5.0.tar.gz
collecting enum34>=1.1.3; python_version < "3.4" (from astroid>=1.5.1->pylint)
using cached enum34-1.1.6-py2-none-any.whl
collecting lazy-object-proxy (from astroid>=1.5.1->pylint)
using cached lazy-object-proxy-1.3.1.tar.gz
collecting wrapt (from astroid>=1.5.1->pylint)
using cached wrapt-1.10.10.tar.gz
installing collected packages: enum34, singledispatch, lazy-object-proxy, backports.functools-lru-ca
che, wrapt, astroid, mccabe, isort, configparser, pylint
exception:
raceback (most recent call last):
file "/library/python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/basecommand.py", line 215, in main
status = self.run(options, args)
file "/library/python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/commands/install.py", line 342, in
run
prefix=options.prefix_path,
file "/library/python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/req/req_set.py", line 784, in inst
all
**kwargs
file "/library/python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/req/req_install.py", line 851, in
install
self.move_wheel_files(self.source_dir, root=root, prefix=prefix)
file "/library/python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/req/req_install.py", line 1064, in
move_wheel_files
isolated=self.isolated,
file "/library/python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/wheel.py", line 345, in move_wheel
_files
clobber(source, lib_dir, true)
file "/library/python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/wheel.py", line 316, in clobber
ensure_dir(destdir)
file "/library/python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/utils/__init__.py", line 83, in en
sure_dir
os.makedirs(path)
file "/system/library/frameworks/python.framework/versions/2.7/lib/python2.7/os.py", line 157, in
makedirs
mkdir(name, mode)
oserror: [errno 13] permission denied: '/library/python/2.7/site-packages/enum'
这个应该是权限错误。
没办法一个个创建文件夹，比如在/library/python/2.7/site-packages/下执行
sudo mkdir enum
后面的权限报错一样的处理方法，一步步试验，直到安装成功