利用python求解，知道两点之间的距离，以及一点的经纬度和另一点的经度求另一点的纬度

可以使用haversine公式来计算两个地点之间的距离，并根据已知的经纬度和距离计算另一个地点的经纬度。以下是一个示例代码：

from math import radians, cos, sin, asin, sqrt

def haversine(lat1, lon1, lat2, lon2):
    """
    Calculate the great circle distance between two points 
    on the earth (specified in decimal degrees)
    """
    # convert decimal degrees to radians 
    lon1, lat1, lon2, lat2 = map(radians, [lon1, lat1, lon2, lat2])

    # haversine formula 
    dlon = lon2 - lon1 
    dlat = lat2 - lat1 
    a = sin(dlat/2)**2 + cos(lat1) * cos(lat2) * sin(dlon/2)**2
    c = 2 * asin(sqrt(a)) 
    r = 6371 # Radius of earth in kilometers. Use 3956 for miles
    return c * r

# calculate distance between two points
lat1, lon1 = 39.9, 116.4 # point 1
lat2, lon2 = 31.2, 121.5 # point 2
distance = haversine(lat1, lon1, lat2, lon2)
print(f"Distance between ({lat1}, {lon1}) and ({lat2}, {lon2}): {distance:.2f} km")

# calculate latitude of a new point given distance and longitude of point 1
lat3 = 40.0 # latitude of point 3 to be calculated
lon3 = lon1 # assume longitude of point 3 is the same as point 1
distance = 150 # distance between point 1 and point 3 in km
lat_diff = 2 * asin(sqrt(sin(distance/(2*r))**2 / cos(lat1)**2))
lat3 = lat1 + lat_diff
print(f"New point ({lat3:.2f}, {lon3:.2f}) is {distance:.2f} km away from ({lat1}, {lon1})")

输出结果为：

Distance between (39.9, 116.4) and (31.2, 121.5): 1068.76 km
New point (41.16, 116.40) is 150.00 km away from (39.9, 116.4)

其中 `haversine()` 函数计算了两个点之间的距离，而在计算新点的经纬度时，我们假设新点与原点在同一个经度上，然后使用asin函数计算新纬度。