python-PIL模块画图
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 = img.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***
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.closeimport 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.\[email protected]'#
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()
下一篇： Spring（02）——bean实例化
推荐阅读
-
Android Studio怎么新建Android公共库模块?
-
Python中MySQLdb和torndb模块对MySQL的断连问题处理
-
seajs和requirejs模块化简单案例分析
-
Python中import导入上一级目录模块及循环import问题的解决
-
加装电信3G模块MC5725攻略
-
Python的socket模块源码中的一些实现要点分析
-
Node学习记录之cluster模块
-
vue 搭建后台系统模块化开发详解
-
卸载VS2011 Developer Preview后Sql Server2008 R2建立数据库关系图报“找不到指定的模块”错误的解决方法
-
Python使用自带的ConfigParser模块读写ini配置文件