在Python中以逗号开头和结尾打印？

为什么这样不行？如何在行首和行尾加逗号？

不完全清楚您想要什么。也许：

#!/usr/bin/python

for line in open("blah.txt"):
if "$" in line:
    print (","line",")

---

你想要什么还不完全清楚。也许：

#!/usr/bin/python

for line in open("blah.txt"):
if "$" in line:
    print (","line",")

试试这个

print ',%s,' % line

试试这个

print ',%s,' % line

---

我想这就是你想要的：

#!/usr/bin/python

f = open("blah.txt");       # open file
for line in f:              # iterate over lines in file
  line = line.strip()       # strip leading and trailing white space
  print ("," + line + ",")  # print line between commas
f.close() # close file      # close file when done

---

我想这就是你想要的：

#!/usr/bin/python

f = open("blah.txt");       # open file
for line in f:              # iterate over lines in file
  line = line.strip()       # strip leading and trailing white space
  print ("," + line + ",")  # print line between commas
f.close() # close file      # close file when done

---

缩进是代码中的问题还是在此处键入时出现的？缩进是正确的，它发生在此处。缩进是代码中的问题还是在此处键入时出现的？缩进是正确的，它发生在此处。谢谢。所以你删除了空白并关闭了连接。谢谢。所以你去掉了空白并关闭了连接。