最近在用python自动生成c++的类.因为这些类会根据需求不同产生不同的类,所以需要用python自动生成.由于会产生大量的类,而且这些类是变化的.所以如果是在某个.h中要用include来加载这些类,会累死人的.所以用python来生成这些类的头文件引用和类的类名声明
先看例子,再聊python的读写文件的代码 在聊聊我的python代码
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好吧.上面的图就是面临的需求
下面来聊聊从网上找的读写文件的python代码吧.csdn的一个博主写的很详细. python如何读写文件:http://blog.csdn.net/adupt/article/details/4435615
仔细阅读完博主的讲解后,有这么一段
file_object = open('thefile.txt')
try: all_the_text = file_object.read( )finally: file_object.close( )
针对上面的这段代码我会在来个说明 关于 try except finally with 等的帖子 <python中的 try except finally with>
恩.好了,下面把我的python代码也就是实现最开始的截图的代码放这里 供自己以后类似的情况来参考
1 #!/usr/bin/python #此文件是自动生成头文件声明的python脚本 2 # -*- encoding: utf-8 -*- 3 import os 4 5 def generateRecordsHeaderInclude(folderPath): 6 7 try: 8 filePath = os.path.join(folderPath,"misc_records.h") 9 with open(filePath, "w") as file: 10 recordsFolderPath = os.path.join(folderPath, 'records') #E:fare_uuidmiscincludemisc ecords 存放生成的类的.h 11 includeNames = os.listdir(recordsFolderPath) #获取records文件夹下的所有文件名 12 #写c++代码 13 file.write("#ifndef MISC_MISC_RECORDS_H_ ") 14 file.write("#define MISC_MISC_RECORDS_H_ ") 15 file.write(" //Records ") 16 17 for includeName in includeNames: 18 file.write('#include "misc/records/%s" ' % includeName) 19 20 file.write("#endif /* MISC_MISC_RECORDS_H_ */") 21 except: 22 print "create file %s\misc_records.h error" % folderPath 23 return 24 25 print "create file %s\misc_records.h success!" % folderPath 26 27 28 29 if __name__ == '__main__': 30 homedir = r"E:farestar_uuidmisc" 31 folderPath = os.path.join(homedir, 'include', 'misc') 32 print 'folderPath = ' + folderPath 33 34 generateRecordsHeaderInclude(folderPath) #E:farestar_uuidmiscincludemisc
1 #!/usr/bin/python #此文件是自动生成c++类的类名声明的python脚本 2 # -*- encoding: utf-8 -*- 3 import os 4 5 def getStructName(recFilePath, fwdFilePath): 6 try: 7 with open(recFilePath, 'r') as file: 8 for line in file: 9 if 'struct' in line and ': public MiscObject' in line: 10 words = line.split(" ") 11 structIndex = words.index('struct') # 类名里面是 struct xxx : public MiscObject 所以读到这一行的时候就拆解处 类名来 12 return words[structIndex+1] 13 except: 14 print 'read %s error' % filePath 15 print 'create %s error' % fwdFilePath 16 raise RuntimeError("create %s error in genRecordsStructDeclare.py" % fwdFilePath) 17 18 19 def generateRecordsStructDeclare(folderPath): 20 try: 21 fwdFilePath = os.path.join(folderPath,"misc_fwd.h") #类名声明的头文件 22 with open(fwdFilePath, "w") as file: 23 recordsFolderPath = os.path.join(folderPath, 'records') #所以的类名的.h文件在records文件夹下 24 recFileNames = os.listdir(recordsFolderPath) 25 26 27 file.write("#ifndef MISC_MISC_FWD_H_ ") 28 file.write("#define MISC_MISC_FWD_H_ ") 29 30 file.write('#include "misc/miscid.h" ') 31 file.write('#include "misc/miscerrorcode.h" ') 32 file.write('namespace misc ') 33 file.write('{ ') 34 for recFileName in recFileNames: 35 recFilePath = os.path.join(recordsFolderPath, recFileName) #xxxx/recors/agency.h 36 structName = getStructName( recFilePath, fwdFilePath) 37 file.write(' struct %s; ' % structName) #生成一行类名声明 38 file.write('} ') 39 40 #file.write('#include "misc/records/%s" ' % includeName) 41 42 file.write("#endif /* MISC_MISC_FWD_H_ */") 43 except: 44 print "create file %s error" % fwdFilePath 45 return 46 47 print "create file %s success!" % fwdFilePath 48 49 50 51 if __name__ == '__main__': 52 homedir = r"E:farestar_uuidmisc" 53 folderPath = os.path.join(homedir, 'include', 'misc') 54 print 'folderPath = ' + folderPath 55 56 generateRecordsHeaderInclude(folderPath)