Question

I am stuck with the logic here… i have to extract some values from a text file that looks like this

AAA
+-------------+------------------+
|          ID |            count |
+-------------+------------------+
|           3 |             1445 |
|           4 |              105 |
|           9 |              160 |
|          10 |               30 |
+-------------+------------------+
BBB
+-------------+------------------+
|          ID |            count |
+-------------+------------------+
|           3 |             1445 |
|           4 |              105 |
|           9 |              160 |
|          10 |               30 |
+-------------+------------------+
CCC
+-------------+------------------+
|          ID |            count |
+-------------+------------------+
|           3 |             1445 |
|           4 |              105 |
|           9 |              160 |
|          10 |               30 |
+-------------+------------------+

I am not able to extract value from BBB alone and append it to a list like

f = open(sys.argv[1], "r")
text = f.readlines()
B_Values = []
for i in text:
    if i.startswith("BBB"):(Example)
       B_Values.append("only values of BBB")
    if i.startswith("CCC"):
       break

print B_Values

should result

['|           3 |             1445 |','|           4 |              105 |','|           9 |              160 |','|          10 |               30 |']

Answer 1

d = {}
with open(sys.argv[1]) as f:
    for line in f:
        if line[0].isalpha(): # is first character in the line a letter?
            curr = d.setdefault(line.strip(), [])
        elif filter(str.isdigit, line): # is there any digit in the line?
            curr.append(line.strip())

for this file, d is now:

{'AAA': ['|           3 |             1445 |',
         '|           4 |              105 |',
         '|           9 |              160 |',
         '|          10 |               30 |'],
 'BBB': ['|           3 |             1445 |',
         '|           4 |              105 |',
         '|           9 |              160 |',
         '|          10 |               30 |'],
 'CCC': ['|           3 |             1445 |',
         '|           4 |              105 |',
         '|           9 |              160 |',
         '|          10 |               30 |']}

Your B_values are d['BBB']