Python实现多个圆和圆中圆的检测
主要思想是先检测外边圆和圆心
然后再外圆内检测小圆，计算小圆圆心与外圆圆心的距离判断是不是有问题
或者可以计算两圆圆心的距离
# coding:utf-8
import math
import cv2
import numpy as np
import os
def findNeedlePoints(img):
gray_src= cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
minThreshValue = 50
_, gray = cv2.threshold(gray_src, minThreshValue, 255, cv2.THRESH_BINARY)
erosion_size = 3
# element = cv2.getStructuringElement(cv2.MORPH_ELLIPSE, (2 * erosion_size + 1, 2 * erosion_size + 1),
# (erosion_size, erosion_size))
element = cv2.getStructuringElement(cv2.MORPH_ERODE, (2 * erosion_size + 1, 2 * erosion_size + 1),
(erosion_size, erosion_size))
# MORPH_ELLIPSE 不同的测试一下
erosion_gray = cv2.erode(gray, element, 3)
cv2.imshow("erosion_gray", erosion_gray)
paramsIn = cv2.SimpleBlobDetector_Params()
paramsIn.filterByArea = True
# 不同图片应该调节的参数
paramsIn.minArea = 80
paramsIn.maxArea = 1000
paramsIn.minDistBetweenBlobs = 80
paramsIn.filterByColor = True
paramsIn.filterByConvexity = False
paramsIn.minThreshold = 100*2
paramsIn.maxThreshold = 1000
# 图像取反
needleGray = 255 - erosion_gray.copy()
# 中值滤波和腐蚀去噪
needleGray = cv2.medianBlur(needleGray, 3)
# cv2.imshow('needleGray', needleGray)
erosion_size = 2
element = cv2.getStructuringElement(cv2.MORPH_RECT, (2 * erosion_size + 1, 2 * erosion_size + 1),
(erosion_size, erosion_size))
needlePoints = cv2.erode(needleGray, element, 1)
cv2.imshow('needle=Points', needlePoints)
detector2 = cv2.SimpleBlobDetector_create(paramsIn)
needleKeypoints = detector2.detect(needlePoints)
# opencv
needle_keypoints = cv2.drawKeypoints(needlePoints, needleKeypoints, np.array([]), (255, 0, 0),
cv2.DRAW_MATCHES_FLAGS_DRAW_RICH_KEYPOINTS)
allNeedlePoints = []
if needleKeypoints is not None:
for i in range(len(needleKeypoints)):
allNeedlePoints.append(needleKeypoints[i].pt)
color_img = cv2.cvtColor(needle_keypoints, cv2.COLOR_BGR2RGB)
# needle_img = cv2.cvtColor(im_with_keypoints, cv2.COLOR_BGR2RGB)
cv2.imshow('holeShow', color_img)
# cv2.imshow('needleShow', needle_img)
cv2.waitKey()
def innerHoughCicle(hsv_image, src_image, rect):
# 霍夫变换圆检测
gray_src = cv2.cvtColor(hsv_image, cv2.COLOR_HSV2RGB)
gray_src = cv2.cvtColor(gray_src, cv2.COLOR_RGB2GRAY)
minThreshValue = 100
_, gray = cv2.threshold(gray_src, minThreshValue, 255, cv2.THRESH_BINARY)
kernel1 = np.ones((3, 3), dtype=np.uint8)
kernel2 = np.ones((3, 3), dtype=np.uint8)
gray = cv2.erode(gray, kernel2, 2)
gray = cv2.dilate(gray, kernel1, 2) # 1:迭代次数，也就是执行几次膨胀操作
# cv2.namedWindow("gray", 2)
# cv2.imshow("gray", gray)
# cv2.waitKey()
circles = cv2.HoughCircles(gray, cv2.HOUGH_GRADIENT, 2, 100, param1=100, param2=60, minRadius=10, maxRadius=100)
# 如果没检测到会报错
# 这种判断方式过于简单
if circles is None:
print("没有检测到连接器外圆")
else:
for circle in circles[0]:
# 圆的基本信息
# print(circle[2])
# 坐标行列－圆心坐标
out_x = int(circle[0])
out_y = int(circle[1])
# 半径
r = int(circle[2])
# # 在原图用指定颜色标记出圆的边界
cv2.circle(hsv_image, (out_x, out_y), r, (0, 0, 255), 2)
# # 画出圆的圆心
cv2.circle(hsv_image, (out_x, out_y), 3, (0, 0, 255), -1)
cv2.namedWindow("hsv_circle", 2)
cv2.imshow("hsv_circle",hsv_image)
cv2.waitKey()
def outHoughCicle(hsv_image, src_image, rect):
# 霍夫变换圆检测
gray_src = cv2.cvtColor(hsv_image, cv2.COLOR_HSV2RGB)
gray_src = cv2.cvtColor(gray_src, cv2.COLOR_RGB2GRAY)
minThreshValue = 50
_, gray = cv2.threshold(gray_src, minThreshValue, 255, cv2.THRESH_BINARY)
kernel1 = np.ones((3, 3), dtype=np.uint8)
kernel2 = np.ones((3, 3), dtype=np.uint8)
gray = cv2.erode(gray, kernel2, 2)
gray = cv2.dilate(gray, kernel1, 2) # 1:迭代次数，也就是执行几次膨胀操作
cv2.namedWindow("gray", 2)
cv2.imshow("gray", gray)
cv2.waitKey()
circles = cv2.HoughCircles(gray, cv2.HOUGH_GRADIENT, 1, 10e10, param1=100, param2=60, minRadius=500, maxRadius=10000)
# 如果没检测到会报错
# 这种判断方式过于简单
if circles is None:
print("没有检测到连接器外圆")
else:
for circle in circles[0]:
# 圆的基本信息
# print(circle[2])
# 坐标行列－圆心坐标
out_x = int(circle[0])
out_y = int(circle[1])
# 半径
r = int(circle[2])
# # 在原图用指定颜色标记出圆的边界
cv2.circle(hsv_image, (out_x, out_y), r, (0, 0, 255), 2)
# # 画出圆的圆心
cv2.circle(hsv_image, (out_x, out_y), 3, (0, 0, 255), -1)
# 画在原图上
cv2.circle(src_image, (out_x + rect[0], out_y + rect[1]), r, (0, 0, 255), 2)
# # 画出圆的圆心
cv2.circle(src_image, (out_x + rect[0], out_y+ rect[1]), 3, (0, 0, 255), -1)
cv2.namedWindow("hsv_circle", 2)
cv2.imshow("hsv_circle",hsv_image)
cv2.namedWindow("src_image", 2)
cv2.imshow("src_image",src_image)
cv2.waitKey()
# 检测针脚位置
def needelCenter_detect(img):
params = cv2.SimpleBlobDetector_Params()
# Setup SimpleBlobDetector parameters.
# print('params')
# print(params)
# print(type(params))
# Filter by Area.
params.filterByArea = True
params.minArea = 100
params.maxArea = 10e3
params.minDistBetweenBlobs = 50
# params.filterByColor = True
params.filterByConvexity = False
# tweak these as you see fit
# Filter by Circularity
params.filterByCircularity = False
params.minCircularity = 0.2
# params.blobColor = 0
# # # Filter by Convexity
# params.filterByConvexity = True
# params.minConvexity = 0.87
# Filter by Inertia
# params.filterByInertia = True
# params.filterByInertia = False
# params.minInertiaRatio = 0.01
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
# Detect blobs.
minThreshValue = 100
_, gray = cv2.threshold(gray, minThreshValue, 255, cv2.THRESH_BINARY)
erosion_size = 1
# element = cv2.getStructuringElement(cv2.MORPH_ELLIPSE, (2 * erosion_size + 1, 2 * erosion_size + 1),
# (erosion_size, erosion_size))
element = cv2.getStructuringElement(cv2.MORPH_ERODE, (2 * erosion_size + 1, 2 * erosion_size + 1),
(erosion_size, erosion_size))
dilate_gray = cv2.dilate(gray, element, 1)
# cv2.namedWindow("gray", 2)
# cv2.imshow("gray",dilate_gray)
# cv2.waitKey()
detector = cv2.SimpleBlobDetector_create(params)
keypoints = detector.detect(dilate_gray)
# print(len(keypoints))
# print(keypoints[0].pt[0])
# 如果这儿没检测到可能会出错
if len(keypoints) == 0:
print("没有检测到针角坐标，可能需要调整针角斑点检测参数")
print(keypoints)
return keypoints
else:
print("检测到孔的数量", len(keypoints))
# im_with_keypoints = cv2.drawKeypoints(img, keypoints, np.array([]), (255, 0, 0),
# cv2.DRAW_MATCHES_FLAGS_DRAW_RICH_KEYPOINTS)
#
# color_img = cv2.cvtColor(im_with_keypoints, cv2.COLOR_BGR2RGB)
# 画出圆的圆心
# for kp in keypoints:
# cv2.circle(img, (int(kp.pt[0]), int(kp.pt[1])), 3, (0, 0, 255), -1)
#
# cv2.namedWindow("color_img", 2)
# cv2.imshow("color_img",img)
# # cv2.waitKey()
return keypoints
# 检测外部区域针或孔的位置
def out_circle_detect(rect_hole_info, src):
# 灰度化
circle_img = rect_hole_info
gray = cv2.cvtColor(circle_img, cv2.COLOR_HSV2RGB)
gray = cv2.cvtColor(gray, cv2.COLOR_RGB2GRAY)
# 输出图像大小，方便根据图像大小调节minRadius和maxRadius
# print(image.shape)
# 进行中值滤波
img = cv2.medianBlur(gray, 3)
erosion_size = 3
# element = cv2.getStructuringElement(cv2.MORPH_ELLIPSE, (2 * erosion_size + 1, 2 * erosion_size + 1),
# (erosion_size, erosion_size))
element = cv2.getStructuringElement(cv2.MORPH_ERODE, (2 * erosion_size + 1, 2 * erosion_size + 1),
(erosion_size, erosion_size))
dilate_gray = cv2.dilate(img, element, 1)
# cv2.namedWindow("dilate_gray", 2)
# cv2.imshow("dilate_gray", dilate_gray)
# cv2.waitKey()
# 针角圆心坐标
out_x, out_y, r = 0, 0, 0
# 霍夫变换检测最大圆
circles = cv2.HoughCircles(dilate_gray, cv2.HOUGH_GRADIENT, 1, 1000, param1=100, param2=30, minRadius=500, maxRadius=1000)
# 如果没检测到会报错
# 这种判断方式过于简单
if circles is None:
print("没有检测到连接器外圆")
return 0, 0, 0
else:
for circle in circles[0]:
# 圆的基本信息
# print(circle[2])
# 坐标行列－圆心坐标
out_x = int(circle[0])
out_y = int(circle[1])
# 将检测到的坐标保存
# 半径
r = int(circle[2])
# print(r)
# # # 在原图用指定颜色标记出圆的边界
cv2.circle(circle_img, (out_x, out_y), r, (0, 0, 255), 2)
# # 画出圆的圆心
cv2.circle(circle_img, (out_x, out_y), 5, (0, 0, 255), -1)
cv2.namedWindow("circle_imgs", 2)
cv2.imshow("circle_imgs", circle_img)
cv2.waitKey()
return out_x, out_y, r
# 检测内部区域针或孔的位置
def inner_circle_detect(rect_hole_info, src):
# 灰度化
circle_img = rect_hole_info
gray = cv2.cvtColor(circle_img, cv2.COLOR_HSV2RGB)
gray = cv2.cvtColor(gray, cv2.COLOR_RGB2GRAY)
# 输出图像大小，方便根据图像大小调节minRadius和maxRadius
# print(image.shape)
# 进行中值滤波
img = cv2.medianBlur(gray, 3)
erosion_size = 3
# element = cv2.getStructuringElement(cv2.MORPH_ELLIPSE, (2 * erosion_size + 1, 2 * erosion_size + 1),
# (erosion_size, erosion_size))
element = cv2.getStructuringElement(cv2.MORPH_ERODE, (2 * erosion_size + 1, 2 * erosion_size + 1),
(erosion_size, erosion_size))
dilate_gray = cv2.dilate(img, element, 1)
# cv2.namedWindow("dilate_gray", 2)
# cv2.imshow("dilate_gray", dilate_gray)
# cv2.waitKey()
# 针角圆心坐标
out_x_p = []
out_y_p = []
rudis = []
# 霍夫变换检测最大圆
circles = cv2.HoughCircles(dilate_gray, cv2.HOUGH_GRADIENT, 1, 100, param1=100, param2=30, minRadius=20, maxRadius=100)
# 如果没检测到会报错
# 这种判断方式过于简单
if circles is None:
print("没有检测到连接器外圆")
return out_x_p, out_y_p
else:
for circle in circles[0]:
# 圆的基本信息
# print(circle[2])
# 坐标行列－圆心坐标
out_x = int(circle[0])
out_y = int(circle[1])
# 将检测到的坐标保存
out_x_p.append(out_x)
out_y_p.append(out_y)
# 半径
r = int(circle[2])
rudis.append(r)
# print(r)
# # # 在原图用指定颜色标记出圆的边界
cv2.circle(circle_img, (out_x, out_y), r, (0, 0, 255), 2)
# # 画出圆的圆心
cv2.circle(circle_img, (out_x, out_y), 5, (0, 0, 255), -1)
cv2.namedWindow("circle_img", 2)
cv2.imshow("circle_img",circle_img)
cv2.waitKey()
# 记录外圆坐标
out_xpoints = out_x_p.copy()
out_ypoints = out_y_p.copy()
out_rudis = rudis.copy()
# print("out_xpoints",out_xpoints)
# print("out_ypoints",out_ypoints)
# 只框出单个针角的位置区域
step_center = 25
step_rect = 50
# 遍历所有的孔的位置
# 记录孔的位置
in_x_p = []
in_y_p = []
for i in range(0, len(out_xpoints)):
out_x_begin = out_xpoints[i] - step_center
out_y_begin = out_ypoints[i] - step_center
needleRect = circle_img[out_y_begin: out_y_begin + step_rect, out_x_begin: out_x_begin + step_rect]
# cv2.namedWindow("needleRect", 2)
# cv2.imshow("needleRect", needleRect)
# cv2.waitKey()
# 根据检测到的圆形连接器中心找针角位置
centerPoint = needelCenter_detect(needleRect)
# print(len(centerPoint))
if len(centerPoint) == 0:
out_x_p.remove(out_xpoints[i])
out_y_p.remove(out_ypoints[i])
rudis.remove(out_rudis[i])
print("调整位置")
else:
for cp in centerPoint:
# 将针角的坐标原还至原图
in_x = int(cp.pt[0])
in_y = int(cp.pt[1])
in_x += out_x_begin
in_y += out_y_begin
in_x_p.append(in_x)
in_y_p.append(in_y)
# # # 画出中心孔的圆心
# cv2.circle(circle_img, (in_x, in_y), 4, (0, 255, 0), -1)
# # 画出外孔的圆心
# cv2.circle(circle_img, (out_xpoints[i], out_ypoints[i]), 4, (0, 0, 255), -1)
# # 计算两者的距离
# # 假设通过标定其一个像素代表0.0056mm
# DPI = 0.0198
# dis = math.sqrt(math.pow(out_xpoints[i] - in_x,2) + math.pow(out_ypoints[i] - in_y,2))
# print("两者相互之间的距离为（mm）:", dis*DPI)
return in_x_p,in_y_p
# cv2.namedWindow("image", 2)
# cv2.imshow("image",circle_img)
# cv2.waitKey()
# if len(out_x_p) == 0:
# print("没检测到，需要调整位置")
# else:
# for j in range(0,len(out_x_p)):
# # 画出外孔的圆心
# cv2.circle(circle_img, (out_x_p[j], out_y_p[j]), rudis[j], (0, 0, 255), 3)
# cv2.circle(circle_img, (out_x_p[j], out_y_p[j]), 3, (0, 0, 255), -1)
#
# # cv2.circle(circle_img, (in_x_p[j], in_y_p[j]), 3, (0, 255, 0), -1)
#
# cv2.namedWindow("image", 2)
# cv2.imshow("image",circle_img)
# cv2.waitKey()
def j599_4_holes_dectWX(imagePath, templatePath):
# templatePath需要用户手动框获取ROI
img = cv2.imread(imagePath)
img_roi = cv2.imread(templatePath)
if img_roi is None:
print("no image")
# HSV二值化
img_roi = cv2.medianBlur(img_roi, 5) # 中值滤波
outx, outy, outR = out_circle_detect(img_roi, img)
print(outx, outy, outR )
inx, iny = inner_circle_detect(img_roi, img)
if len(inx) == 0 or outx == 0:
print("没检测到位置")
return "没检测到对象", -1
else:
cv2.circle(img_roi, (outx, outy), outR, (0, 0, 255), 3)
is_ok = []
for k in range(0, len(inx)):
# 计算两者的距离
# 假设通过标定其一个像素代表0.0056mm
# 两者相互之间的距离为（mm）: 9.311053946788194
# 两者相互之间的距离为（mm）: 9.163550379629067
# 两者相互之间的距离为（mm）: 8.95984457900917
# 两者相互之间的距离为（mm）: 8.977940966613671
# 平均值为 9.103 所以其阈值为9.103 + 0.5
DPI = 0.0198
dis = math.sqrt(math.pow(outx - inx[k], 2) + math.pow(outy - iny[k], 2))
dis *= DPI
# print("两者相互之间的距离为（mm）:", dis)
if dis < 9.603:
cv2.circle(img_roi, (inx[k], iny[k]), 8, (0, 255, 0), -1)
# print("没有插针歪斜，产品合格")
is_ok.append(1)
else:
cv2.circle(img_roi, (inx[k], iny[k]), 20, (0, 0, 255), 3)
# print("有插针歪斜，不合格")
is_ok.append(0)
# cv2.namedWindow("image", 2)
# cv2.imshow("image",img_roi)
# cv2.waitKey()
isExists = os.path.exists("./runs/J599/")
if not isExists:
os.makedirs("./runs/J599/")
cv2.imwrite("./runs/J599/result.jpg", img_roi)
if 0 in is_ok:
print("有插针歪斜，不合格")
return "有插针歪斜，不合格"
else:
print("没有插针歪斜，产品合格")
return "没有插针歪斜，产品合格"
if __name__ == "__main__":
reslut = j599_4_holes_dectWX("images/Final/E_0_8.jpg","J599-4holes_template.jpg")
print(reslut)
#
# # # # 4holes
# img = cv2.imread("images/Final/E_0_8.jpg", 1)
# # img_roi = img[973:2027, 1713:2751]
# # img_roi = img[852:2224, 1515:2940]
# img_roi = img[842:2234, 1480:2950]
# cv2.imwrite("J599-4holes_template.jpg",img_roi)
#
# # cv2.namedWindow("img_roi",2)
# # cv2.imshow("img_roi", img_roi)
# # cv2.waitKey()
# if img_roi is None:
# print("no image")
# else:
# # HSV二值化
# img_roi = cv2.medianBlur(img_roi, 5) # 中值滤波
# outx, outy, outR = out_circle_detect(img_roi, img)
# print(outx, outy, outR )
# inx, iny = inner_circle_detect(img_roi, img)
# if len(inx) == 0 or outx == 0:
# print("没检测到位置")
# else:
# cv2.circle(img_roi, (outx, outy), outR, (0, 0, 255), 3)
#
# for k in range(0, len(inx)):
# # 计算两者的距离
# # 假设通过标定其一个像素代表0.0056mm
# # 两者相互之间的距离为（mm）: 9.311053946788194
# # 两者相互之间的距离为（mm）: 9.163550379629067
# # 两者相互之间的距离为（mm）: 8.95984457900917
# # 两者相互之间的距离为（mm）: 8.977940966613671
# # 平均值为 9.103 所以其阈值为9.103 + 0.5
# DPI = 0.0198
# dis = math.sqrt(math.pow(outx - inx[k], 2) + math.pow(outy - iny[k], 2))
# dis *= DPI
# # print("两者相互之间的距离为（mm）:", dis)
# if dis > 9.603:
# cv2.circle(img_roi, (inx[k], iny[k]), 20, (0, 0, 255), 3)
# print("有插针歪斜，不合格")
# else:
# cv2.circle(img_roi, (inx[k], iny[k]), 8, (0, 255, 0), -1)
# print("没有插针歪斜，产品合格")
#
# cv2.namedWindow("image", 2)
# cv2.imshow("image",img_roi)
# cv2.waitKey()
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简述 基于python使用opencv实现在一张图片中检测出圆形,并且根据坐标和半径标记出圆.不涉及理论,只讲应用. 霍夫变换检测圆形的原理 其实检测圆形和检测直线的原理差别不大,只不过直线是在二维空间,因为y=kx+b,只有k和b两个自由度.而圆形的一般性方程表示为(x-a)²+(y-b)²=r².那么就有三个自由度圆心坐标a,b,和半径r.这就意味着需要更多的计算量,而OpenCV中提供的cvHoughCircle()函数里面可以设定半径r的取值范围,相当于有一个先验设定,在每一个r来说,在
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Python+OpenCV实现单个圆形孔和针检测
如果中间红色区域是针则可以用下面的代码检测,其阈值和斑点检测的参数根据图像像素值做相应修改 检测的主要思路是先通过找到外面的大圆,再通过圆心定位出一个ROI区域,在ROI区域中检测中心的检测对象 import os import cv2 import numpy as np import math # 检测针脚位置 def needelCenter_detect(img): params = cv2.SimpleBlobDetector_Params() # Setup SimpleBlobDe
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Python下opencv使用hough变换检测直线与圆
在数字图像中,往往存在着一些特殊形状的几何图形,像检测马路边一条直线,检测人眼的圆形等等,有时我们需要把这些特定图形检测出来,hough变换就是这样一种检测的工具. Hough变换的原理是将特定图形上的点变换到一组参数空间上,根据参数空间点的累计结果找到一个极大值对应的解,那么这个解就对应着要寻找的几何形状的参数(比如说直线,那么就会得到直线的斜率k与常熟b,圆就会得到圆心与半径等等). 关于hough变换,核心以及难点就是关于就是有原始空间到参数空间的变换上.以直线检测为例,假设有一条直线L,
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Python+OpenCV实现图片中的圆形检测
效果展示 中心的三个没检测到 import cv2 import numpy as np import matplotlib.pyplot as plt w = 20 h = 5 params = cv2.SimpleBlobDetector_Params() # Setup SimpleBlobDetector parameters. print('params') print(params) print(type(params)) # Filter by Area. params.filte
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Python实现多个圆和圆中圆的检测
主要思想是先检测外边圆和圆心 然后再外圆内检测小圆,计算小圆圆心与外圆圆心的距离判断是不是有问题 或者可以计算两圆圆心的距离 # coding:utf-8 import math import cv2 import numpy as np import os def findNeedlePoints(img): gray_src= cv2.cvtColor(img,cv2.COLOR_BGR2GRAY) minThreshValue = 50 _, gray = cv2.threshold(gr
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JavaScript+html5 canvas制作的圆中圆效果实例
本文实例讲述了JavaScript+html5 canvas制作的圆中圆效果.分享给大家供大家参考,具体如下: 运行效果截图如下: 具体代码如下: <!DOCTYPE html> <html> <head> <title>demo</title> <style type="text/css"> #canvas { background:#F2F2F2; height:500px; height:500px; mar
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python编程之requests在网络请求中添加cookies参数方法详解
哎,好久没有学习爬虫了,现在想要重新拾起来.发现之前学习爬虫有些粗糙,竟然连requests中添加cookies都没有掌握,惭愧.废话不宜多,直接上内容. 我们平时使用requests获取网络内容很简单,几行代码搞定了,例如: import requests res=requests.get("https://cloud.flyme.cn/browser/index.jsp") print res.content 你没有看错,真的只有三行代码.但是简单归简单,问题还是不少的. 首先,这
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Python实现比较两个文件夹中代码变化的方法
本文实例讲述了Python实现比较两个文件夹中代码变化的方法.分享给大家供大家参考.具体如下: 这里将修改代码后的目录与原始目录做对比,罗列出新增的代码文件,以及修改过的代码文件 # -*- coding: utf-8 -*- import os; folderA = "F:\\Projects\\FreeImageV3_14_1\\".lower(); folderB = u"E:\\Software\\图像解码库\\FreeImage3141\\FreeImage\\&q
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Python输出PowerPoint（ppt）文件中全部文字信息的方法
本文实例讲述了Python输出PowerPoint(ppt)文件中全部文字信息的方法.分享给大家供大家参考.具体分析如下: 下面的代码依赖于windows com,所以必须在机器上安装PowerPoint才能用,可以将PPT文件中的所有纯文本信息进行输出到指定的文件,非常实用. import win32com from win32com.client import Dispatch, constants ppt = win32com.client.Dispatch('PowerPoint.App
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Python实现树的先序、中序、后序排序算法示例
本文实例讲述了Python实现树的先序.中序.后序排序算法.分享给大家供大家参考,具体如下: #encoding=utf-8 class Tree(): def __init__(self,leftjd=0,rightjd=0,data=0): self.leftjd = leftjd self.rightjd = rightjd self.data = data class Btree(): def __init__(self,base=0): self.base = base #前序遍历 根
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Python结巴中文分词工具使用过程中遇到的问题及解决方法
本文实例讲述了Python结巴中文分词工具使用过程中遇到的问题及解决方法.分享给大家供大家参考,具体如下: 结巴分词是Python语言中效果最好的分词工具,其功能包括:分词.词性标注.关键词抽取.支持用户词表等.这几天一直在研究这个工具,在安装与使用过程中遇到一些问题,现在把自己的一些方法帖出来分享一下. 官网地址:https://github.com/fxsjy/jieba 1.安装. 按照官网上的说法,有三种安装方式, 第一种是全自动安装:easy_install jieba 或者 pip
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python清除指定目录内所有文件中script的方法
本文实例讲述了python清除指定目录内所有文件中script的方法.分享给大家供大家参考.具体如下: 将脚本存储为stripscripts.py 调用语法 : python stripscripts.py <directory> 使用范例 : python stripscripts.py d:\myfiles # Hello, this is a script written in Python. See http://www.pyhon.org import os,sys,string,r
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python实现应用程序在右键菜单中添加打开方式功能
最近项目组开发的一个小工具想要在右键菜单中添加打开方式,以有道云笔记为例进行了需求拆解和代码编写 1.需求拆解: 如何实现手动添加右键菜单的打开方式: Step1:打开注册表编辑器,Win+R->输入 "regedit" Step2:在HKEY_CLASSES_ROOT/*/shell (或者HKEY_LOCAL_MACHINE/SOFTWARE/Classes/*/shell ,两个目录是一样的) 添加一个key:YNote,然后在该项中新建项command,然后再编辑字符串,
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python使用xlrd模块读取xlsx文件中的ip方法
程序中经常需要使用excel文件,批量读取文件中的数据 python读取excel文件可以使用xlrd模块 pip install xlrd安装模块 示例: #coding=utf8 import xlrd from os import path import sys filename='ip.xlsx' if not path.isfile(filename): print "err: not exists or not file ip.xlsx " sys.exit() getfi