python-PIL模块画图

发布时间：2019-09-06 08:57:35编辑：auto阅读（1515）

python中执行mysql遇到like 怎么办 ？
​
​sql = "SELECT * FROM T_ARTICLE WHERE title LIKE '%%%%%s%%%%'" % searchStr

执行成功，print出SQL语句之后为：

SELECT * FROM T_ARTICLE WHERE title LIKE '%%生活%%'

原因：
Python在执行sql语句的时候，同样也会有%格式化的问题，仍然需要使用%%来代替%。因此要保证在执行sql语句的时候格式化正确。而不只是在sql语句（字符串）的时候正确。

import Image, ImageDraw, ImageFont, ImageFilter
​
import random

随机字母

def rndChar():
return chr(random.randint(65, 90))

随机颜色1

def rndColor():
return (random.randint(64, 255), random.randint(64, 255), random.randint(64, 255))

随机颜色2

def rndColor2():
return (random.randint(32, 127), random.randint(32, 127), random.randint(32, 127))

240 * 60

width = 60 * 4
height = 60
image = Image.new('RGB', (width, height), (255,255,255))

创建Font对象

font = ImageFont.truetype('/usr/share/fonts-droid/truetype/DroidSansFallback.ttf', 36)

创建Draw对象

draw = ImageDraw.Draw(image)

填充每个像素

for x in range(width):
for y in range(height):
draw.point((x, y),fill=rndColor())

输出文字

for t in range(4):
draw.text((60 * t +10, 10), rndChar(), font=font, fill=rndColor2())

模糊

image = image.filter(ImageFilter.BLUR)
​
image.save('/home/godben/code.jpg', 'jpeg')

#!/usr/bin/env python
#coding=utf-8
import random
from PIL import Image, ImageDraw, ImageFont, ImageFilter
​
_letter_cases = "abcdefghjkmnpqrstuvwxy" # 小写字母，去除可能干扰的i，l，o，z
_upper_cases = _letter_cases.upper() # 大写字母
_numbers = ''.join(map(str, range(3, 10))) # 数字
​
init_chars = ''.join((_letter_cases, _upper_cases, _numbers))
​
def create_validate_code(size=(120, 30),
chars=init_chars,
img_type="GIF",
mode="RGB",
bg_color=(255, 255, 255),
fg_color=(0, 0, 255),
font_size=18,
font_type="kk.TTF",
length=4,
draw_lines=True,
n_line=(1, 2),
draw_points=True,
point_chance = 2):
'''
@todo: 生成验证码图片
@param size: 图片的大小，格式（宽，高），默认为(120, 30)
@param chars: 允许的字符集合，格式字符串
@param img_type: 图片保存的格式，默认为GIF，可选的为GIF，JPEG，TIFF，PNG
@param mode: 图片模式，默认为RGB
@param bg_color: 背景颜色，默认为白色
@param fg_color: 前景色，验证码字符颜色，默认为蓝色#0000FF
@param font_size: 验证码字体大小
@param font_type: 验证码字体，默认为 ae_AlArabiya.ttf
@param length: 验证码字符个数
@param draw_lines: 是否划干扰线
@param n_lines: 干扰线的条数范围，格式元组，默认为(1, 2)，只有draw_lines为True时有效
@param draw_points: 是否画干扰点
@param point_chance: 干扰点出现的概率，大小范围[0, 100]
@return: [0]: PIL Image实例
@return: [1]: 验证码图片中的字符串
'''
width, height = size # 宽， 高
img = Image.new(mode, size, bg_color) # 创建图形
draw = ImageDraw.Draw(img) # 创建画笔

def get_chars():
    '''生成给定长度的字符串，返回列表格式'''
    return random.sample(chars, length)

def create_lines():
    '''绘制干扰线'''
    line_num = random.randint(*n_line) # 干扰线条数
    for i in range(line_num):
        # 起始点
        begin = (random.randint(0, size[0]), random.randint(0, size[1]))
        #结束点
        end = (random.randint(0, size[0]), random.randint(0, size[1]))
        draw.line([begin, end], fill=(0, 0, 0))

def create_points():
    '''绘制干扰点'''
    chance = min(100, max(0, int(point_chance))) # 大小限制在[0, 100]

    for w in xrange(width):
        for h in xrange(height):
            tmp = random.randint(0, 100)
            if tmp > 100 - chance:
                draw.point((w, h), fill=(0, 0, 0))

def create_strs():
    '''绘制验证码字符'''
    c_chars = get_chars()
    strs = ' %s ' % ' '.join(c_chars) # 每个字符前后以空格隔开

    font = ImageFont.truetype(font_type, font_size)
    font_width, font_height = font.getsize(strs)
    draw.text(((width - font_width) / 3, (height - font_height) / 3),
                strs, font=font, fill=fg_color)

    return ''.join(c_chars)
if draw_lines:
    create_lines()
if draw_points:
    create_points()
strs = create_strs()
# 图形扭曲参数
params = [1 - float(random.randint(1, 2)) / 100,
          0,
          0,
          0,
          1 - float(random.randint(1, 10)) / 100,
          float(random.randint(1, 2)) / 500,
          0.001,
          float(random.randint(1, 2)) / 500
          ]

​
img = img.transform(size, Image.PERSPECTIVE, params) # 创建扭曲
img = img.filter(ImageFilter.EDGE_ENHANCE_MORE) # 滤镜，边界加强（阈值更大）
​
return img, strs
​
if name == "main":
code_img = create_validate_code()
code_img[0].save("xiaorui.cc.gif", "GIF")

#coding:utf-8
#编写验证码
#随机的数值
#图片
import random #python随机模块
from PIL import Image #图片
from PIL import ImageDraw #画笔
from PIL import ImageFont #字体
from PIL import ImageFilter #滤镜 验证码扭曲

#验证码编写步骤

#1、定义随机数
sample_text = "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
sample_list = random.sample(sample_text,4)
randomText = "".join(sample_list)

#2、定义图片
img = Image.new("RGB",(150,50),(255,255,255))
#第一个参数是配色方案
#第二个参数是图片的尺寸px 宽高
#第三个参数是颜色 255,255,255是白色
​
#3、图片上绘制干扰项
​
#实例化画笔
draw = ImageDraw.Draw(img)
#绘制干扰线
for i in range(random.randint(10,20)): #随机循环1-10次

draw.line(
    #两个点决定一条线
    #每个点有x,y两个值
    [
        (
            random.randint(1,150), # x
            random.randint(1,150), # y
        ),#点一

        (
            random.randint(1,150),  # x
            random.randint(1,150),  # y
        )#点二

    ],#一条线

    fill = (random.randint(0,255),random.randint(0,255),random.randint(0,255)) #线条颜色

) #绘制线条

#绘制点

for j in range(1000):
draw.point(
​ [ random.randint(1, 150), # x
random.randint(1, 150), # y
],#一个点
fill=(random.randint(0, 255), random.randint(0, 255), random.randint(0, 255)) # 线条颜色

)

#4、书写文字
#定义字体

text = "".join(randomText)

font = ImageFont.truetype("simsun.ttc",36) #定义字体

draw.text((random.randint(1, 10),random.randint(1, 5)),text,font = font,fill = "green") #书写文字

#文字起始位置
#文字内容
#文字字体
#文字颜色

#5、进行滤镜扭曲
#定义扭曲的参数

params = [
1-float(random.randint(1,2))/100,
0,
0,
0,
1 - float(random.randint(1, 2)) / 100,
float(random.randint(1, 2)) / 100,
0.001,
float(random.randint(1, 2)) / 100
]
​
#使用滤镜
img = img.transform((150,50),Image.PERSPECTIVE,params)
img = img.filter(ImageFilter.EDGE_ENHANCE_MORE)

#6、查看效果
img.show() #展示
img.save("%s.jpg"%randomText,"JPEG") #保存，保存路径

生成随机验证码图片

import string
from random import randint, sample
from PIL import Image, ImageDraw, ImageFont, ImageFilter

Image 负责处理图片

ImageDraw 画笔

ImageFont 文字

ImageFileter 滤镜

定义变量

img_size = (150,50) # 定义画布大小
img_rgb = (255,255,255) # 定义画布颜色，白色
img = Image.new("RGB",img_size,img_rgb)

img_text = " ".join(sample(string.ascii_letters+string.digits, 5))
​

print(img_text.replace(' ',''))

画图

drow = ImageDraw.Draw(img)
for i in range(10):

随机画线

drow.line([tuple(sample(range(img_size[0]),2)), tuple(sample(range(img_size[0]),2))], fill=(0,0,0))

for i in range(99):

随机画点

drow.point(tuple(sample(range(img_size[0]),2)), fill=(0,0,0))

文字

font = ImageFont.truetype("simsun.ttc", 24) # 定义文字字体和大小
drow.text((6,6), img_text, font=font, fill="green")

扭曲图片和滤镜

params = [
1 - float(randint(1,2)) / 100,
0,
0,
0,
1 - float(randint(1,10)) /100,
float(randint(1,2)) / 500,
0.001,
float(randint(1,2)) / 500
]
​
img = im​g.transform(img_size, Image.PERSPECTIVE, params)
​
img = img.filter(ImageFilter.EDGE_ENHANCE_MORE)

展示图片

img.show()

写一个理财计算器，实现将每日/月/年的利息进行复投进行计算

money = float(input('请输入您打算用来投资的本金 \> '))
year = int(input('请输入投资期限(单位：年) \> '))
rate = float(input('请输入投资年化收益率 \> '))
Type = int(input('''1.每日利息复投 2.每月利息复投 3.每年利息复投 请选择复投方式 \> '''))

def day_return(money,year,rate=0.12):
'方案：每日利息加入本金复投！'
for y in range(year):
for day in range(365):
money = money*rate/365 + money
print('第%d年结束时，本金为：%.2f' % (y+1,money))

def month_return(money,year,rate=0.12):
'方案：每月利息加入本金复投！'
for y in range(year):
for month in range(12):
money = money*rate/12 + money
print('第%d年结束时，本金为：%.2f' % (y+1,money))

def year_return(money,year,rate=0.12):
'方案：每年利息加入本金复投！'
for y in range(year):
money = money*rate + money
print('第%d年结束时，本金为：%.2f' % (y+1,money))

if Type == 1:
day_return(money,year,rate)
elif Type == 2:
month_return(money,year,rate)
elif Type == 3:
year_return(money,year,rate)
else:
print('输入有误！')

百度翻译

Python 3.5.1

from urllib import request, parse
import json

url = 'http://fanyi.baidu.com/v2transapi'
context = input('请输入需要翻译的内容 :\> ')

if context >= '\u4e00' and context <= '\u9fa5':

判断输入内容是否为汉字

From,To = 'zh','en'

else:
From,To = 'en','zh'

data = {
'query':context,
'from':From,
'to':To,
'transtype':'translang',
'simple_means_flag':3
}
data = parse.urlencode(data).encode('utf-8')

r = request.Request(url,data)
r.add_header('User-Agent','Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:50.0) Gecko/20100101 Firefox/50.0')
html = request.urlopen(r).read().decode('utf-8')
Result = json.loads(html)

print('翻译结果为:' + Result['trans_result']['data'][0]['dst'])

简单的拼手气红包

import random
from time import sleep

所有涉及金额的浮点数都需要用 round 方法保留2位小数，避免出现最终结果多出0.01

amount = round(float(input('请设置红包的金额 \> ')),2)
num = int(input('请设置红包的数量 \> '))
hb_dict = {}
xing = '赵钱孙李周吴郑王'
ming = '一二三四五六七八九十'

while num:

xingming = random.choice(xing)+random.choice(ming)+random.choice(ming)
if xingming in hb_dict.keys():
    xingming = random.choice(xing)+random.choice(ming)+random.choice(ming)

num -= 1
if num == 0:
    print('%s抢到红包%.2f元 红包抢完了!' % (xingming,amount))
    hb_dict[amount] = xingming
    amount -= amount
elif num > 0:
    hb = round(random.uniform(0.01,amount)/num,2)
    hb_dict[hb] = xingming
    # 算法: 在0.01到红包总金额之间随机一个浮点数 / 红包剩余个数
    print('%s抢到红包%.2f元 剩余%d个!' % (xingming,hb,num))
    amount = round((amount - hb),2)

sleep(1)

转置字典中的 key / value

hb_dict2 = {value:key for key,value in hb_dict.items()}

max_hb = max(hb_dict.items())
print('%s运气最佳 抢得%.2f元!!' % (max_hb[1],max_hb[0]))

随机生成200个序列号

import random
import string

for num in range(200):
numlist = []
for i in range(12):
numlist.append(random.choice(string.ascii_uppercase+string.digits))

print(''.join(numlist))

with open('200.txt', 'a') as f:     # 'a' 表示追加写入
    f.write(''.join(numlist)+'\n')

f.close

import Image, ImageFont, ImageDraw
text = "EwWIieAT"
im = Image.new("RGB",(130,35), (255, 255, 255))
dr = ImageDraw.Draw(im)
​
font = ImageFont.truetype("kk.TTF", 24)
#simsunb.ttf 这个从windows fonts copy一个过来
dr.text((10, 5), text, font=font, fill="#000000")
​
im.show()
im.save("t.png")

缩略图

from PIL import Image
img = Image.open('god.jpg')
img = img.resize((250, 156), Image.ANTIALIAS)
img.save('sharejs_small.jpg')

PythonWare公司提供了免费的图像处理工具包PIL(Python Image Library),该软件包提供了基本的图像处理功能，本文介绍了使用PIL工具包中的Image模块进行比对的过程。

#!/usr/bin/env python

-- coding:utf-8 --

import Image, ImageChops

img1 = Image.open(r'C:\cygwin\tmp\Sonic1.jpg') Capture1.PNG
img2 = Image.open(r'C:\cygwin\tmp\Sonic2.jpg') Diff.jpg
img3 = ImageChops.invert(img2)
Image.blend(img1,img3,0.5).show()

PIL处理图片之加水印

#!/usr/bin/env python

-- coding: utf-8 --

import Image, ImageEnhance, ImageDraw, ImageFont

def text2img(text, font_color="Blue", font_size=25):

"""生成内容为 TEXT 的水印"""

font = ImageFont.truetype('simsun.ttc', font_size)

#多行文字处理
text = text.split('\n')
mark_width = 0
for  i in range(len(text)):
    (width, height) = font.getsize(text[i])
    if mark_width < width:
        mark_width = width
mark_height = height * len(text)

#生成水印图片
mark = Image.new('RGBA', (mark_width,mark_height))
draw = ImageDraw.ImageDraw(mark, "RGBA")
draw.setfont(font)

​
for i in range(len(text)):
(width, height) = font.getsize(text[i])
draw.text((0, i*height), text[i], fill=font_color)
return mark
​
​
​def set_opacity(im, opacity):

"""设置透明度"""

assert opacity >=0 and opacity < 1
if im.mode != "RGBA":
    im = im.convert('RGBA')
else:
    im = im.copy()
alpha = im.split()[3]
alpha = ImageEnhance.Brightness(alpha).enhance(opacity)
im.putalpha(alpha)
return im

​
​def watermark(im, mark, position, opacity=1):

"""添加水印"""

try:
    if opacity < 1:
        mark = set_opacity(mark, opacity)
    if im.mode != 'RGBA':
        im = im.convert('RGBA')
    if im.size[0] < mark.size[0] or im.size[1] < mark.size[1]:
        print "The mark image size is larger size than original image file."
        return False

    #设置水印位置

    if position == 'left_top':
        x = 0
        y = 0
    elif position == 'left_bottom':
        x = 0
        y = im.size[1] - mark.size[1]
    elif position == 'right_top':
        x = im.size[0] - mark.size[0]
        y = 0
    elif position == 'right_bottom':
        x = im.size[0] - mark.size[0]
        y = im.size[1] - mark.size[1]
    else:
        x = (im.size[0] - mark.size[0]) / 2
        y = (im.size[1] - mark.size[1]) / 2

    layer =Image.new('RGBA', im.size,)
    layer.paste(mark,(x,y))
    returnImage.composite(layer, im, layer)

 exceptExceptionas 
             e:print">>>>>>>>>>> WaterMark EXCEPTION:  "+ str(e)

returnFalsedef
main():
text = u'Linsir.水印.\nvi5i0n@hotmail.com'#
text = open('README.md').read().decode('utf-8')#
print text
im =Image.open('origal.png')
mark = text2img(text)
image = watermark(im, mark,'center',0.9)
if image:
image.save('watermark.png')
image.show()else:print"Sorry, Failed."

if name =='main':

import sys, Image

img = Image.open(sys.argv[1]).convert('YCbCr')

w, h = img.size

data = img.getdata()

cnt = 0

for i, ycbcr in enumerate(data):

y, cb, cr = ycbcr  

if 86 <= cb <= 117 and 140 <= cr <= 168:  

    cnt += 1  

print '%s %s a porn image.'%(sys.argv[1], 'is' if cnt > w h 0.3 else 'is not')

运行：
E:/>c:/python25/python test_skin.py 114.jpeg

114.jpeg is a porn image.

import pymysql

获取一个数据库连接,注意如果是UTF-8类型的,需要制定数据库

db=pymysql.connect(host="127.0.0.1",user="root",passwd="123456",db="mysql",charset='utf8' )
​

使用 cursor()方法创建一个游标对象 cursor

cursor = db.cursor()
​

使用 execute()方法执行 SQL 查询

cursor.execute("SELECT user,host,password from user")
​

使用 fetchall()方法获取所有行.

data = cursor.fetchall()
​
print(data)
cursor.close()#关闭游标
db.close()#关闭数据库连接

import pymysql

db = pymysql.connect(host='10.3.1.174',user='root',password='123456',db='test')
cursor = db.cursor()

SQL 插入数据

sql = "INSERT INTO employee (first_name, last_name, age, sex, income) " \
"VALUES ('w', 'Eason', '29', 'M', '8000')"
​

SQL 更新数据

sql = "UPDATE employee first_name = Wang WHERE first_name = w"

​

SQL 删除数据

sql = "DELETE FROM employee WHERE age > 20"

try:
cursor.execute(sql)
db.commit()
except:
db.rollback()

db.close()

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