Python实现文件读写

xiaoxiao2021-03-01  11

if scores[i] <= 0: break #f.write(item+' '+str(label+1)+' '+str(score)+' '+str(int(box[0]))+' '+str(int(box[1]))+' '+str(int(box[2]))+' '+str(int(box[3]))+' \n') f.write(item+' '+str(int(labels[i])+1)+' '+str(float(scores[i]))+' '+str(boxes[i][0])+' '+str(boxes[i][1])+' '+str(boxes[i][2])+' '+str(boxes[i][3])+' \n')

实现逐行写

f = open('test.txt','w') for i in range(5): f.write('hello world!' + ',' + 'heoo 3' +'\n') f.write('hello world!' + ' ' + 'heoo4' +'\n') f.close() print('write finish!')

实现逐行读

fp = open('test.txt', 'r') lines = fp.readlines() fp.close() for i, line in enumerate(lines): temp = line.split(' ') print (temp[0]) print (temp[1]) #print (temp[2])

 

 

fp = open('test.txt', 'r') lines = fp.readlines() fp.close() for i, line in enumerate(lines): temp = line.split(' ') #print (%(temp[0],temp[1]),end = ',') print ("sum of " + str(temp[0]) + " and " + str(temp[0]) + " is ",end= " ") #print (temp[1],end = ',') #print (temp[2],end = ' ') a = 10 b = 20 c = a + b #Normal string concatenation print("sum of", a , "and" , b , "is" , c) #convert variable into str print("sum of " + str(a) + " and " + str(b) + " is " + str(c)) # if you want to print in tuple way print("Sum of %s and %s is %s: " %(a,b,c)) #New style string formatting print("sum of {0} and {1} is {2}".format(a,b,c)) #in case you want to use repr() print("sum of " + repr(a) + " and " + repr(b) + " is " + repr(c))

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