Machine learning-based learning route know almost users to fine-tune the proposed learning diary
Andrew Ng machine learning basic grammar and python
- python from entry to practice 2.1-2.3
print("Hello Python world!")
message="Hello Python world!"
print(message)
message="Hello Crash Course world!"
#变量名只能包括字母、数字、下划线，不能以数字开头
name="ada Loveplace"
print(name.title())#首字母大写
print(name.upper())#全大写
print(name.lower())#全小写
fist_name='ada'
last_name='loveplace'
full_name=fist_name+" "+last_name#字符串直接加法
print(full_name)
print("Hello, "+full_name.title()+'!')
#制表符\t换行符\n
favorate_language=' Python '
print(favorate_language.rstrip()+'a')#返回 无字符串尾部空格
print(favorate_language+'a')
favorate_language=favorate_language.rstrip()
print(favorate_language+'a')
print(favorate_language.lstrip()+'a')#返回 无字符串首部空格
favorate_language=' Python '
print(favorate_language.strip()+'a')#返回 无字符串两端的空格
print(10**6)#两个乘号表示乘方运算
print(0.2+0.1)#浮点数精度有限