Python入門簡單操作

2021-08-29 01:19:32 字數 3357 閱讀 4954

# -*- coding: utf-8 -*-

"""created on fri oct 12 15:40:37 2018

@author: administrator

"""#%%

import tensorflow as tf

import numpy as np

a = np.array([1,2,3,4,5,6,7,8,9],dtype='float32');

a = a.reshape(3,3);

c = a + [22,33,44];#c.dtype='float64'

c = c.astype(np.float32)

#c.dtype = 'float32'

print('c=',c);

condition = 1

while (condition < 10):

print(condition)

condition = condition + 1

example_list = [1,2,3,4,5,6,7,88,99]

for i in example_list:

print(i)

for i in range(len(example_list)):

print(i)

print(example_list[i])

for i in range(2,10):

print(i)

x = 1

y = 0

z = 3

if(x>y):

print('x>y')

elif(x==y):

print('x=y')

else:

print('xdef func(x,y=3):

a = x;

b = y;

c = a + b;

print(c)

return a,b,c

d1,d2,d3=func(3,4)

#%%variable

def func(x,y=3):

a = x;

b = y;

print(a)

func(3)

func(3)

#%%檔案寫

text = 'this is my first test.\nthis is my second test.\nthis is my end test.\n'

filename = r'c:\users\administrator\desktop\python\my file.txt'

my_file = open(filename,'w')

my_file.write(text)

my_file.close()

text = 'this is my first test.\nthis is my second test.\nthis is my end test.\n'

filename = r'c:\users\administrator\desktop\python\my file.txt'

my_file = open(filename,'a')

my_file.close()

#%%檔案讀

filename = r'c:\users\administrator\desktop\python\my file.txt'

my_file = open(filename,'r')

read_text = my_file.read()

#read_text1 = my_file.readlines()

my_file.close()

print(read_text)

#print(read_text1)

#%%class 類 和 __init__ 初始化功能

class calculator:

name = 'good calculator'

price = 18

def __init__ (self,name,price,height,width,weight):

self.name = name

self.price = price

self.h = height

self.wi = width

self.we = weight

def add(self,x,y):

result = x + y

print(result)

def minus(self,x,y):

result = x - y

print(result)

def times(self,x,y):

print(x*y)

def divide(self,x,y):

print(x/y)

calcu = calculator('bad calculator',12,30,15,19)

#%% 元組和列表

#tuple list

a_tuple = (12,3,4,5)

another_tuple = 1,2,45

#list

a_list = [12,35,66]

for i in range(len(a_tuple)):

print(a_tuple[i])

for i in range(len(a_list)):

print(a_list[i])

#%%列表

a = [1,2,3,4,5]

a.insert(0,0)

a.remove(2)

print(a.index(0))

#%%多維列表

a = [[1,2,3],[4,5,6],]

print(a[0][1])#2

#%%字典 dictionary

'pear':2,

'orange':3}

del d['pear']

print(d)

d['b'] = 20

d['c'] = 20

print(d)

#%%載入自己的模組 import

#方法一

import time

print(time.localtime())

#方法二

import time as t

print(t.localtime())

#方法三

from time import time,localtime

print(time())

#方法四

from time import*

#%%載入自己的模組

import m1

print(10)

m1.aa()

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