如何从 .txt 文件中提取浮点值以用于 python 中的计算？

Question

count = 0
fname = input("Enter file name: ")
fh = open(fname)
for line in fh:
    if line.startswith("X-DSPAM-Confidence:") :
        print(line)
        count = count + 1
print(count)

There is a file with 27 lines like X-DSPAM-Confidence: 0.xxxxx, I need to extract the numerical value from each of them to be used for calculations.

Answer 1

count = 0
fname = input("Enter file name: ")
fh = open(fname)
for line in fh:
    if line.startswith("X-DSPAM-Confidence:") :
        print(line)
        count = count + 1
print(count)

There is a file with 27 lines like X-DSPAM-Confidence : 0.xxxxx, I need to extract the numerical value from each of them to be used for calculations.

Answer 2

count = 0
fname = input("Enter file name: ")
fh = open(fname)
for line in fh:
    if line.startswith("X-DSPAM-Confidence:") :
        print(line)
        count = count + 1
print(count)

There is a file with 27 lines like X-DSPAM-Confidence : 0.xxxxx, I need to extract the numerical value from each of them to be used for calculations.

Answer 3

count = 0
fname = input("Enter file name: ")
fh = open(fname)
for line in fh:
    if line.startswith("X-DSPAM-Confidence:") :
        print(line)
        count = count + 1
print(count)

There is a file with 27 lines like X-DSPAM-Confidence : 0.xxxxx, I need to extract the numerical value from each of them to be used for calculations.

Answer 4

count = 0
fname = input("Enter file name: ")
fh = open(fname)
for line in fh:
    if line.startswith("X-DSPAM-Confidence:") :
        print(line)
        count = count + 1
print(count)

There is a file with 27 lines like X-DSPAM-Confidence : 0.xxxxx, I need to extract the numerical value from each of them to be used for calculations.

Answer 5

count = 0
fname = input("Enter file name: ")
fh = open(fname)
for line in fh:
    if line.startswith("X-DSPAM-Confidence:") :
        print(line)
        count = count + 1
print(count)

There is a file with 27 lines like X-DSPAM-Confidence : 0.xxxxx, I need to extract the numerical value from each of them to be used for calculations.

Answer 6

fname = input("Enter file name:")
fh = open(fname)
count = 0
s=0
for line in fh:
    if not line.startswith("X-DSPAM-Confidence:"):
        continue
    count = count+1
    pos = line.find('0')
    floatingP = float(line[pos:])
    s += floatingP
print(s/count)

Answer 7

use count and sum then sum/count enter image description here