python中執行mysql遇到like 怎麼辦？

sql = "SELECT * FROM T_ARTICLE WHERE title LIKE '%%%%%s%%%%'" % searchStr

執行成功，print出SQL語句之後爲：

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

原因：
Python在執行sql語句的時候，同樣也會有%格式化的問題，仍然需要使用%%來代替%。因此要保證在執行sql語句的時候格式化正確。而不只是在sql語句（字符串）的時候正確。

import Image, ImageDraw, ImageFont, ImageFilter

import random

隨機字母

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

隨機顏色1

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

隨機顏色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))

創建Font對象

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

創建Draw對象

draw = ImageDraw.Draw(image)

填充每個像素

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

輸出文字

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" # 小寫字母，去除可能干擾的i，l，o，z
_upper_cases = _letter_cases.upper() # 大寫字母
_numbers = ''.join(map(str, range(3, 10))) # 數字

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: 生成驗證碼圖片
@param size: 圖片的大小，格式（寬，高），默認爲(120, 30)
@param chars: 允許的字符集合，格式字符串
@param img_type: 圖片保存的格式，默認爲GIF，可選的爲GIF，JPEG，TIFF，PNG
@param mode: 圖片模式，默認爲RGB
@param bg_color: 背景顏色，默認爲白色
@param fg_color: 前景色，驗證碼字符顏色，默認爲藍色#0000FF
@param font_size: 驗證碼字體大小
@param font_type: 驗證碼字體，默認爲 ae_AlArabiya.ttf
@param length: 驗證碼字符個數
@param draw_lines: 是否劃干擾線
@param n_lines: 干擾線的條數範圍，格式元組，默認爲(1, 2)，只有draw_lines爲True時有效
@param draw_points: 是否畫干擾點
@param point_chance: 干擾點出現的概率，大小範圍[0, 100]
@return: [0]: PIL Image實例
@return: [1]: 驗證碼圖片中的字符串
'''
width, height = size # 寬，高
img = Image.new(mode, size, bg_color) # 創建圖形
draw = ImageDraw.Draw(img) # 創建畫筆

def get_chars():
    '''生成給定長度的字符串，返回列表格式'''
    return random.sample(chars, length)

def create_lines():
    '''繪製干擾線'''
    line_num = random.randint(*n_line) # 干擾線條數
    for i in range(line_num):
        # 起始點
        begin = (random.randint(0, size[0]), random.randint(0, size[1]))
        #結束點
        end = (random.randint(0, size[0]), random.randint(0, size[1]))
        draw.line([begin, end], fill=(0, 0, 0))

def create_points():
    '''繪製干擾點'''
    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():
    '''繪製驗證碼字符'''
    c_chars = get_chars()
    strs = ' %s ' % ' '.join(c_chars) # 每個字符前後以空格隔開

    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()
# 圖形扭曲參數
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) # 創建扭曲
img = img.filter(ImageFilter.EDGE_ENHANCE_MORE) # 濾鏡，邊界加強（閾值更大）

return img, strs

if name == "main":
code_img = create_validate_code()
code_img[0].save("xiaorui.cc.gif", "GIF")

#coding:utf-8
#編寫驗證碼
#隨機的數值
#圖片
import random #python隨機模塊
from PIL import Image #圖片
from PIL import ImageDraw #畫筆
from PIL import ImageFont #字體
from PIL import ImageFilter #濾鏡驗證碼扭曲

#驗證碼編寫步驟

#1、定義隨機數
sample_text = "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
sample_list = random.sample(sample_text,4)
randomText = "".join(sample_list)

#2、定義圖片
img = Image.new("RGB",(150,50),(255,255,255))
#第一個參數是配色方案
#第二個參數是圖片的尺寸px 寬高
#第三個參數是顏色 255,255,255是白色

#3、圖片上繪製干擾項

#實例化畫筆
draw = ImageDraw.Draw(img)
#繪製干擾線
for i in range(random.randint(10,20)): #隨機循環1-10次

draw.line(
    #兩個點決定一條線
    #每個點有x,y兩個值
    [
        (
            random.randint(1,150), # x
            random.randint(1,150), # y
        ),#點一

        (
            random.randint(1,150),  # x
            random.randint(1,150),  # y
        )#點二

    ],#一條線

    fill = (random.randint(0,255),random.randint(0,255),random.randint(0,255)) #線條顏色

) #繪製線條

#繪製點

for j in range(1000):
draw.point(
[ random.randint(1, 150), # x
random.randint(1, 150), # y
],#一個點
fill=(random.randint(0, 255), random.randint(0, 255), random.randint(0, 255)) # 線條顏色

#4、書寫文字
#定義字體

text = "".join(randomText)

font = ImageFont.truetype("simsun.ttc",36) #定義字體

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

#文字起始位置
#文字內容
#文字字體
#文字顏色

#5、進行濾鏡扭曲
#定義扭曲的參數

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
]

#使用濾鏡
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，保存路徑

生成隨機驗證碼圖片

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

Image 負責處理圖片

ImageDraw 畫筆

ImageFont 文字

ImageFileter 濾鏡

定義變量

img_size = (150,50) # 定義畫布大小
img_rgb = (255,255,255) # 定義畫布顏色，白色
img = Image.new("RGB",img_size,img_rgb)

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

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

畫圖

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

隨機畫線

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):

隨機畫點

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

文字

font = ImageFont.truetype("simsun.ttc", 24) # 定義文字字體和大小
drow.text((6,6), img_text, font=font, fill="green")

扭曲圖片和濾鏡

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)

展示圖片

img.show()

寫一個理財計算器，實現將每日/月/年的利息進行復投進行計算

money = float(input('請輸入您打算用來投資的本金 \> '))
year = int(input('請輸入投資期限(單位：年) \> '))
rate = float(input('請輸入投資年化收益率 \> '))
Type = int(input('''1.每日利息復投 2.每月利息復投 3.每年利息復投請選擇復投方式 \> '''))

def day_return(money,year,rate=0.12):
'方案：每日利息加入本金復投！'
for y in range(year):
for day in range(365):
money = money*rate/365 + money
print('第%d年結束時，本金爲：%.2f' % (y+1,money))

def month_return(money,year,rate=0.12):
'方案：每月利息加入本金復投！'
for y in range(year):
for month in range(12):
money = money*rate/12 + money
print('第%d年結束時，本金爲：%.2f' % (y+1,money))

def year_return(money,year,rate=0.12):
'方案：每年利息加入本金復投！'
for y in range(year):
money = money*rate + money
print('第%d年結束時，本金爲：%.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('輸入有誤！')

百度翻譯

Python 3.5.1

from urllib import request, parse
import json

url = 'http://fanyi.baidu.com/v2transapi'
context = input('請輸入需要翻譯的內容 :\> ')

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

判斷輸入內容是否爲漢字

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('翻譯結果爲:' + Result['trans_result']['data'][0]['dst'])

簡單的拼手氣紅包

import random
from time import sleep

所有涉及金額的浮點數都需要用 round 方法保留2位小數，避免出現最終結果多出0.01

amount = round(float(input('請設置紅包的金額 \> ')),2)
num = int(input('請設置紅包的數量 \> '))
hb_dict = {}
xing = '趙錢孫李周吳鄭王'
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搶到紅包%.2f元 紅包搶完了!' % (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到紅包總金額之間隨機一個浮點數 / 紅包剩餘個數
    print('%s搶到紅包%.2f元 剩餘%d個!' % (xingming,hb,num))
    amount = round((amount - hb),2)

sleep(1)

轉置字典中的 key / value

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

max_hb = max(hb_dict.items())
print('%s運氣最佳搶得%.2f元!!' % (max_hb[1],max_hb[0]))

隨機生成200個序列號

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' 表示追加寫入
    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 這個從windows fonts copy一個過來
dr.text((10, 5), text, font=font, fill="#000000")

im.show()
im.save("t.png")

縮略圖

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

PythonWare公司提供了免費的圖像處理工具包PIL(Python Image Library),該軟件包提供了基本的圖像處理功能，本文介紹了使用PIL工具包中的Image模塊進行比對的過程。

#!/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處理圖片之加水印

#!/usr/bin/env python

-- coding: utf-8 --

import Image, ImageEnhance, ImageDraw, ImageFont

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

"""生成內容爲 TEXT 的水印"""

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

#多行文字處理
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)

#生成水印圖片
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):

"""設置透明度"""

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

    #設置水印位置

    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')

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

114.jpeg is a porn image.

import pymysql

獲取一個數據庫連接,注意如果是UTF-8類型的,需要制定數據庫

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

使用 cursor()方法創建一個遊標對象 cursor

cursor = db.cursor()

使用 execute()方法執行 SQL 查詢

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

使用 fetchall()方法獲取所有行.

data = cursor.fetchall()

print(data)
cursor.close()#關閉遊標
db.close()#關閉數據庫連接