以表格格式写入csv文件

Question

I have two lists which I am trying to write to a csv file in a specific format. Lets call these lists colHead and rowVals . The list colHead contains names of the column headers which need to be written to a csv file. I have achieved this using the following code:

with open(filename, 'wb') as f:
    writer = csv.writer(f)
    writer.writerow(colHead) 

Now, rowVals is a list which contains 250 values. These 250 values, are arranged in an orderly format. I wish to write every 25 values from rowVals under each colHead to achieve the results.

The code I am using (it is not giving me the desired results) is:

with open(filename, 'wb') as f:
    writer = csv.writer(f)
    writer.writerow(colHead)
    for i in range(0,25):
        writer.writerow(rowVal) 
        i+=25

Finally I want to write this format to the csv format.

colHead1,colHead2,colHead3......colHead10
rowVal1, rowVal26, .            , .
rowval2, rowVal27, .            , .
.       , .      , .            , .
.       , .      , .            , .
rowVal25, .      , .            , rowVal250

Please let me know where I am going wrong as well.

Answer 1

just feed writerows with a generator comprehension slicing your 250-item list with a step of 25 like this, 25 times:

writer.writerows(rowVal[i::25] for i in range(25))

I get:

rowval1,rowval26,rowval51,rowval76,rowval101,rowval126,rowval151,rowval176,rowval201,rowval226
rowval2,rowval27,rowval52,rowval77,rowval102,rowval127,rowval152,rowval177,rowval202,rowval227
rowval3,rowval28,rowval53,rowval78,rowval103,rowval128,rowval153,rowval178,rowval203,rowval228
...
rowval24,rowval49,rowval74,rowval99,rowval124,rowval149,rowval174,rowval199,rowval224,rowval249
rowval25,rowval50,rowval75,rowval100,rowval125,rowval150,rowval175,rowval200,rowval225,rowval250