import netCDF4 as nc

# 读取数据###############################################################
data_nc = nc.Dataset(r"./data/WRF/wrfout_d03_2023-01-15_12%3A00%3A00")
print(data_nc.variables['XLAT'])
print(len(data_nc.variables))  # 获取字典variables的长度
print(data_nc.variables.get('XLAT'))  # 获取键（XLAT）的值
print(data_nc.variables.items())  # 以列表返回可遍历的(键, 值) 元组数组
print(data_nc.variables.keys())  # 以列表返回字典所有的键
print(data_nc.variables.values())  # 以列表返回字典中的所有值

# 遍历key的值
for key in data_nc.variables:
    print(key)

# 遍历value的值
for value in data_nc.variables.values():
    print(value)

# 遍历字典键值对
for key in data_nc.variables:
    print(key + ":" + str(data_nc.variables[key]))    # 返回字符串

for i in data_nc.variables.items():
    print(i)    # 返回元组

for key, value in data_nc.variables.items():
    print(key + ':' + str(value))