# Python | Check if all values are 0 in dictionary

While working with dictionary, we might come to a problem in which we require to ensure that all the values are 0 in dictionary. This kind of problem can occur while checking status of start or checking for a bug/action that could have occurred. Let’s discuss certain ways in which this task can be performed.

Method #1 : Using `all()` + dictionary comprehension
The combination of above functions can be used to perform the following task. The all function checks for each key and dictionary comprehension checks for the 0 value.

 `# Python3 code to demonstrate working of ` `# Check if all values are 0 in dictionary ` `# Using all() + dictionary comprehension ` ` `  `# Initialize dictionary ` `test_dict ``=` `{``'gfg'` `: ``0``, ``'is'` `: ``0``, ``'best'` `: ``0``} ` ` `  `# Printing original dictionary  ` `print``(``"The original dictionary is : "` `+` `str``(test_dict)) ` ` `  `# using all() + dictionary comprehension ` `# Check if all values are 0 in dictionary ` `res ``=` `all``(x ``=``=` `0` `for` `x ``in` `test_dict.values()) ` ` `  `# printing result  ` `print``(``"Does all keys have 0 value ? : "` `+` `str``(res)) `

Output :

```The original dictionary is : {'gfg': 0, 'is': 0, 'best': 0}
Does all keys have 0 value ? : True
```

Method #2 : Using `any()` +` not` operator
The combination of above functions can be used to perform this particular task. Rather than checking for all 0, we check for any one non zero value, and negate the result.

 `# Python3 code to demonstrate working of ` `# Check if all values are 0 in dictionary ` `# Using any() + not operator ` ` `  `# Initialize dictionary ` `test_dict ``=` `{``'gfg'` `: ``0``, ``'is'` `: ``1``, ``'best'` `: ``0``} ` ` `  `# Printing original dictionary  ` `print``(``"The original dictionary is : "` `+` `str``(test_dict)) ` ` `  `# using any() + not operator ` `# Check if all values are 0 in dictionary ` `res ``=` `not` `any``(test_dict.values()) ` ` `  `# printing result  ` `print``(``"Does all keys have 0 value ? : "` `+` `str``(res)) `

Output :

```The original dictionary is : {'gfg': 0, 'is': 1, 'best': 0}
Does all keys have 0 value ? : False
```

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