初识Python

python --version // 首先查看系统中是否已经安装了Python，如果没有则继续下一步

brew install python3

brew postinstall python3  //这个操作帮组安装pip3

python3 --version   //查看是否安装成功

python3 //进入到交互模式

print('hello ~')

exit()//退出交互模式

choco install Python3

python --version //刚安装好，需要重启Cmder窗口

setting->install -> script

cd kwy-python

atom ./

# 变量
name, age = 'keweiyang',30
print('{} is 30 yers old'.format(name))

# 分支 if
if age < 28:
    print('not allowed')
else:
    print('ok')

'''
 循环  while  for
'''
number = 0
while number < 6:
    print(number)
    number = number + 1
else:
    print("done!")

for number in range(0,6):
    if number == 4:
        break
    print(number)

class Person:
    # 构造函数，self 等价于 Java中的this
    def __init__(self, name):
        self.name = name

    def greet(self):
        return 'hello ' + name


person = Person('keweiyang')
print(person.greet())

import sys
# 导入部分功能，导入math的pi
from math import pi
help(sys)
# 通过dir函数查看sys提供了什么功能
dir(sys)

print(pi)

keweiyangdeMacBook-Pro:~ keweiyang$ brew search anaconda

==> Searching local taps...

==> Searching taps on GitHub...

caskroom/cask/anaconda

==> Searching blacklisted, migrated and deleted formulae...

keweiyangdeMacBook-Pro:~ keweiyang$ brew install caskroom/cask/anaconda

Updating Homebrew...

export PATH=/usr/local/anaconda3/bin:$PATH

source .bash_profile

conda --help

python --version

choco install anaconda3 //安装需要一段时间
conda --help      //'conda' 不是内部或外部命令，也不是可运行的程序或批处理文件。出现上述信息，提示我们需要设置环境变量

conda info --envs
# conda environments:
#
root                  *  C:\tools\Anaconda3

conda create --name keweiyang numpy pandas

activate keweiyang (在mac下执行source activate kewy)

conda remove --name keweiyang --all

conda list

conda search --full-name python

conda create --name kewy python=2.7.13

conda search blaze

pip install see
conda list|grep see

conda remove arrow

pip uninstall see