搜索开始字符串和搜索结束字符串，然后在python中打印开始到结束行之间的所有行

Question

I have variable output "var1" like below.

load: load1
a: apples
b: banana
c: oranges
d: grapes

load: load2
a: pen
b: paper
c: books

What i want is find first string that is "load: load1" and find last string
"d: grapes" and print the lines below lines.

load: load1
a: apples
b: banana
c: oranges
d: grapes

To serve this purpose i was using "begin" and "end" commands. How get it done using python?

Answer 1

You could do something like (assuming you're loading from a file):

start_line = "load: load1"
end_line = "d: grapes"
print_lines = False

with open('input.txt' , 'r') as f:
    for line in f:
        line = line.rstrip()
        if line == start_line:
            print_lines = True
        if print_lines:
            print line
        if line == end_line:
            print_lines = False
            # Could add a break here if you wanted to do nothing with 
            # the rest of the file; e.g:
            # break