markdown python，enumerate，lambda，syntax

Posted 2021-05-06

lambda:
```
lambda 是函数的简写形式， 实例如下：
g = lambda x: x+1 
ret = g(1)

output:
ret = 2

等效于
def g(x):
  return x+1
ret = g(1)

output:
ret = 2
```

enumerate:
```
my_list = ['apple', 'banana', 'grapes', 'pear']
for c, value in enumerate(my_list, 1):
    print(c, value)

# Output:
# 1 apple
# 2 banana
# 3 grapes
# 4 pear
```