Файловый ввод и вывод

s1 = 0
s2 = 0
s3 = 0
s4 = 0
s5 = 0
s6 = 0
s7 = 0
s8 = 0
s9 = 0
s10 = 0
s11 = 0
i1 = 0
i2 = 0
i3 = 0
i4 = 0
i5 = 0
i6 = 0
i7 = 0
i8 = 0
i9 = 0
i10 = 0
i11 = 0
a = 1
b = 1
while(1):
    if a == 0 and b == 0:
        break
    a = int(input())
    b = int(input())
    if a == 1:
        s1 += b
        i1 += 1
    elif a == 2:
        s2 += b
        i2 += 1
    elif a == 3:
        s3 += b
        i3 += 1
    elif a == 4:
        s4 += b
        i4 += 1 
    elif a == 5:
        s5 += b
        i5 += 1
    elif a == 6: 
        s6 += b
        i6 += 1
    elif a == 7:
        s7 += b
        i7 += 1
    elif a == 8:
        s8 += b
        i8 += 1
    elif a == 9:
        i9 += 1
        s9 += b 
    elif a == 10:
        i10 += 1 
        s10 += b 
    elif a == 11:
        i11 += 1
        s11 += b
print('1', s1 / i1)
print('2', s2 / i2)
print('3', s3 / i3)
print('4', s4 / i4)
print('5', s5 / i5)
print('6', s6 / i6)
print('7', s7 / i7)
print('8', s8 / i8)
print('9', s9 / i9)
print('10', s10 / i10)
print('11', s11 / i11)

with open('file1.txt', 'w') as f:
    f.write(str(15))

with open('file1.txt', 'w') as f:
with open('file2.txt', 'r') as d:

with open('file1.txt', 'r') as d:
    with open('file2.txt', 'w') as f:
        a = d.read()
        f.write(a)

with open('file1.txt', 'r', 'file2.txt', 'w') as d, f:

with open('sum.in', 'r') as f, open('sum.out', 'w') as g:
    for line in f:
        line = line.split()
    sum = 0
    for x in line:
        sum += int(x)
    g.write(str(sum))

with open('in.txt', 'r') as f, open('out.txt', 'w') as g:
    s = []
    v = 0
    for line in f:
        s += line.split()
        v += 1
 
    t = [0] * 11
    t2 = [0] * 11
    k = 0
    for i in range(2, v * 3, 3):
        k = int(s[i - 2])
        if 1 <= k <= 11:
            t[k - 1] += int(s[i])
            t2[k - 1] += 1
 
    for i in range(0, 11):
        value = [i + 1, ' ', t[i] / t2[i], '\n']
        for x in value:
            g.write(str(x))

with open('in.txt', 'r') as inFile, open('out.txt', 'w') as outFile:
    myList = []
    number3Line = 0
    for line in inFile:
        myList += line.split()
        number3Line += 1
 
    classes = [0] * 11
    countClass = [0] * 11
    idxClass = 0
    for idx in range(2, number3Line * 3, 3):
        idxClass = int(myList[idx - 2])
        if 1 <= idxClass <= 11:
            classes[idxClass - 1] += int(myList[idx])
            countClass[idxClass - 1] += 1
 
    for iClass in range(0, 11):
        strFilePrint = [iClass + 1, ' ', classes[iClass] / countClass[iClass], '\n']
        for arithmetic_mean in strFilePrint:
            outFile.write(str(arithmetic_mean))

with open('in.txt', 'r') as in_file, open('out.txt', 'w') as out_file:
    my_list = []
    number_3_line = 0
    for line in in_file:
        my_list += line.split()
        number_3_line += 1
 
    classes = [0] * 11
    count_class = [0] * 11
    idx_class = 0
    for idx in range(2, number_3_line * 3, 3):
        idx_class = int(my_list[idx - 2])
        if 1 <= idx_class <= 11:
            classes[idx_class - 1] += int(my_list[idx])
            count_class[idx_class - 1] += 1
 
    for iClass in range(0, 11):
        str_file_print = [iClass + 1, ' ', classes[iClass] / count_class[iClass], '\n']
        for arithmetic_mean in str_file_print:
            out_file.write(str(arithmetic_mean))

#Правильно:
 
def complex(real, imag=0.0):
    return magic(r=real, i=imag)
 
#Неправильно:
 
def complex(real, imag = 0.0):
    return magic(r = real, i = imag)

#Правильно:
 
i = i + 1
submitted += 1
x = x*2 - 1
hypot2 = x*x + y*y
c = (a+b) * (a-b)
 
#Неправильно:
 
i=i+1
submitted +=1
x = x * 2 - 1
hypot2 = x * x + y * y
c = (a + b) * (a - b)